cschantz
1451 lines
26 KiB
Markdown
1451 lines
26 KiB
Markdown
# Additional Check Opportunities
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## Comprehensive Analysis of Remaining Performance Checks
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**Date**: February 26, 2026
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**Purpose**: Identify checks beyond the current 64+ to reach near-complete coverage
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**Status**: Discovery phase - 40+ additional opportunities identified
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---
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## CATEGORY A: ADVANCED WORDPRESS CHECKS (10 checks) ✅
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### A.1 - Gutenberg Block Performance
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**What to Check**:
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- Are custom Gutenberg blocks using render_callback?
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- Block registration in wp_enqueue_block_editor_assets
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- Client-side vs server-side rendering
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**Remediation Opportunity**:
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```
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IF: Custom Gutenberg blocks with slow callbacks
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THEN: Optimize block rendering or switch to simpler blocks
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```
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---
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### A.2 - WP Query Efficiency
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**What to Check**:
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- Most common WP_Query calls in plugins
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- Queries with high post__in counts
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- Recursive queries
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**Remediation Opportunity**:
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```
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IF: Inefficient WP_Query patterns detected
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THEN: Recommend query optimization or caching
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```
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---
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### A.3 - Post Type Performance
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**What to Check**:
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- Number of custom post types registered
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- Post type with most posts
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- Post type pagination overhead
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**Remediation Opportunity**:
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```
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IF: Too many custom post types (>20)
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THEN: Consider consolidating or archiving
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```
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---
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### A.4 - Taxonomy Bloat
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**What to Check**:
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- Number of terms per taxonomy
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- Taxonomy with most terms
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- Orphaned taxonomy terms
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**Remediation Opportunity**:
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```
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IF: Taxonomy has 100,000+ terms
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THEN: May slow down taxonomy queries
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SOLUTION: Archive old terms or use different structure
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```
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---
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### A.5 - Duplicate Plugin Functionality
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**What to Check**:
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- Two SEO plugins active (Yoast + All in One)
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- Two caching plugins active
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- Two backup plugins active
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- Two security plugins active
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**Remediation Opportunity**:
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```
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IF: Duplicate functionality detected
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THEN: Deactivate one plugin to reduce overhead
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IMPACT: 5-10% performance improvement
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```
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---
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### A.6 - Plugin Version Compatibility
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**What to Check**:
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- Plugin version vs WordPress version compatibility
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- Plugin version vs PHP version compatibility
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- Out-of-date plugins with updates available
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**Remediation Opportunity**:
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```
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IF: Plugin incompatible with current versions
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THEN: Update plugin or replace with compatible alternative
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```
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---
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### A.7 - Theme Code Quality
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**What to Check**:
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- Theme functions.php file size (>100KB = bloated)
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- Theme database queries count
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- Theme enqueue dependencies
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**Remediation Opportunity**:
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```
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IF: Theme functions.php > 100KB
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THEN: Code likely bloated, consider lightweight theme
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```
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---
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### A.8 - Widget Analysis
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**What to Check**:
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- Number of active widgets
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- Widget hooks (wp_head, wp_footer calls)
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- Custom widget database queries
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**Remediation Opportunity**:
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```
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IF: Many widgets with database queries
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THEN: Limit active widgets to high-performance ones
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```
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---
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### A.9 - Custom Post Meta Analysis
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**What to Check**:
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- Custom post meta keys without indexes
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- Post meta with large values (serialized arrays)
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- Post meta query patterns in slow log
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**Remediation Opportunity**:
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```
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IF: Large serialized postmeta values
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THEN: Consider splitting into separate postmeta entries
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```
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---
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### A.10 - Attachment Optimization
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**What to Check**:
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- Number of attachment revisions
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- Unattached media files
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- Thumbnail generation settings
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**Remediation Opportunity**:
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```
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IF: Each attachment has multiple revisions
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THEN: Delete unused attachment revisions
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```
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---
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## CATEGORY B: ADVANCED DATABASE CHECKS (12 checks) ✅
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### B.1 - EXPLAIN PLAN Analysis
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**What to Check**:
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- Parse slow queries and run EXPLAIN on them
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- Identify full table scans
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- Identify missing indexes from EXPLAIN
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**Remediation Opportunity**:
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```
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IF: Full table scan detected in slow query
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THEN: Add index to WHERE clause columns
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```
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---
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### B.2 - Orphaned Tables
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**What to Check**:
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- Tables not matching any plugin/theme
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- Tables from deleted plugins
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- Test tables left behind
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**Remediation Opportunity**:
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```
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IF: Orphaned tables found
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THEN: DELETE orphaned tables to clean database
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```
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---
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### B.3 - NULL Column Analysis
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**What to Check**:
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- Columns that are always NULL
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- Columns that should be nullable but aren't
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**Remediation Opportunity**:
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```
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IF: Columns are always NULL
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THEN: Remove column or set default value
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```
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---
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### B.4 - Character Set Consistency
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**What to Check**:
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- Mixed character sets (utf8 vs utf8mb4)
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- Mixed collations
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- Conversion inefficiencies
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**Remediation Opportunity**:
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```
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IF: Mixed character sets detected
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THEN: Convert all to utf8mb4_unicode_ci
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```
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---
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### B.5 - Replication Lag Detection
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**What to Check**:
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- If using replication, check Seconds_Behind_Master
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- Replication backlog
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**Remediation Opportunity**:
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```
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IF: Seconds_Behind_Master > 60
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THEN: Replication lagging, investigate
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```
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---
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### B.6 - Table Statistics Freshness
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**What to Check**:
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- When table statistics were last updated
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- InnoDB stats
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**Remediation Opportunity**:
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```
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IF: Statistics older than 30 days
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THEN: Run ANALYZE TABLE to update
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```
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---
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### B.7 - Connection Pool Analysis
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**What to Check**:
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- Current vs max connections ratio
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- Connection creation rate
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- Connection pool saturation
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**Remediation Opportunity**:
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```
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IF: Connection creation rate very high
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THEN: Implement connection pooling
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```
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---
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### B.8 - Lock Wait Detection
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**What to Check**:
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- Lock timeout frequency
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- Most frequently locked tables
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- Lock wait time trend
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**Remediation Opportunity**:
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```
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IF: High lock waits on wp_options
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THEN: Add indexes or split options table
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```
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---
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### B.9 - Query Cache Hit Rate
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**What to Check**:
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- Qcache_hits vs Qcache_inserts ratio
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- Query cache effectiveness
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**Remediation Opportunity**:
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```
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IF: Hit rate < 50%
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THEN: Query cache inefficient, disable it
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```
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---
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### B.10 - Deadlock Detection
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**What to Check**:
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- Frequency of InnoDB deadlocks
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- Tables involved in deadlocks
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**Remediation Opportunity**:
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```
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IF: Deadlocks > 10/day
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THEN: Investigate transaction order and add indexes
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```
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---
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### B.11 - Slave Lag in Replication
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**What to Check**:
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- MySQL replication status
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- Slave thread status
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**Remediation Opportunity**:
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```
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IF: Slave status shows errors
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THEN: Fix replication issues
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```
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---
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### B.12 - Query Parse Time
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**What to Check**:
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- Time spent in query parser vs execution
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- Parse overhead percentage
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**Remediation Opportunity**:
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```
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IF: Parse time > 10% of total
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THEN: Consider query plan caching
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```
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---
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## CATEGORY C: CACHING LAYER ANALYSIS (8 checks) ✅
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### C.1 - Cache-Control Headers
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**What to Check**:
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- Cache-Control headers on static files
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- Cache-Control on dynamic content
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- Cache busting strategy
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**Remediation Opportunity**:
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```
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IF: No Cache-Control headers on static assets
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THEN: Add proper cache headers for 1 year caching
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```
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---
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### C.2 - ETag Configuration
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**What to Check**:
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- ETag enabled/disabled
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- ETag generation method
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- ETag efficiency
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**Remediation Opportunity**:
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```
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IF: ETags enabled but not using
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THEN: Disable ETags for faster responses
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```
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---
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### C.3 - Browser Cache Effectiveness
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**What to Check**:
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- 304 Not Modified response rate
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- Cache hit ratio from access logs
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**Remediation Opportunity**:
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```
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IF: Low 304 response rate
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THEN: Improve cache headers and versioning
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```
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---
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### C.4 - Object Cache Hit Rate
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**What to Check**:
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- Redis/Memcached hit rate
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- Cache misses per request
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**Remediation Opportunity**:
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```
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IF: Hit rate < 70%
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THEN: Optimize cache key strategy
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```
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---
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### C.5 - Cache Key Collisions
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**What to Check**:
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- Potential cache key overlaps
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- Cache invalidation patterns
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**Remediation Opportunity**:
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```
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IF: Cache invalidation too broad
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THEN: Use more granular cache keys
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```
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---
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### C.6 - Cache Stampede Detection
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**What to Check**:
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- Multiple requests for same expired key
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- Thundering herd problem
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**Remediation Opportunity**:
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```
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IF: Cache stampede detected
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THEN: Implement cache locking or probabilistic caching
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```
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---
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### C.7 - CDN Cache Headers
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**What to Check**:
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- Cloudflare/CDN cache settings
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- Cache TTL at CDN level
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**Remediation Opportunity**:
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```
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IF: CDN cache TTL too short
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THEN: Increase TTL for static assets
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```
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---
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### C.8 - Stale Content Serving
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**What to Check**:
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- Cache stale-while-revalidate usage
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- Background cache refresh strategy
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**Remediation Opportunity**:
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```
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IF: Content always fresh from origin
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THEN: Consider stale-while-revalidate strategy
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```
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---
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## CATEGORY D: SECURITY VS PERFORMANCE (8 checks) ✅
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### D.1 - SSL Certificate Chain Depth
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**What to Check**:
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- SSL certificate chain length
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- Unnecessary intermediates
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**Remediation Opportunity**:
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```
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IF: Chain depth > 3
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THEN: Optimize certificate chain for faster TLS handshake
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```
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---
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### D.2 - HSTS Headers
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**What to Check**:
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- HSTS max-age value
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- HSTS preload list
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**Remediation Opportunity**:
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```
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IF: HSTS max-age very high
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THEN: May prevent fast downgrades, but secure
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TRADEOFF: Security vs flexibility
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```
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---
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### D.3 - CSP Header Impact
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**What to Check**:
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- Content-Security-Policy header presence
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- CSP report generation overhead
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**Remediation Opportunity**:
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```
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IF: CSP report-uri active
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THEN: May generate overhead, consider disabling in production
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```
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---
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### D.4 - CORS Policy
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**What to Check**:
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- CORS preflight requests
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- Preflight caching headers
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**Remediation Opportunity**:
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```
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IF: High rate of OPTIONS requests
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THEN: Add Access-Control-Max-Age: 86400
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```
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---
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### D.5 - WAF Rule Performance
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**What to Check**:
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- ModSecurity rule execution time
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- Number of rules enabled
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**Remediation Opportunity**:
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```
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IF: WAF adds > 100ms latency
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THEN: Optimize or disable non-critical rules
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```
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---
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### D.6 - Rate Limiting Config
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**What to Check**:
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- Rate limits too aggressive
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- Rate limit headers
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**Remediation Opportunity**:
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```
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IF: Many 429 responses for legitimate traffic
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THEN: Increase rate limits
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```
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---
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### D.7 - Bot Detection Overhead
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**What to Check**:
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- Bot detection library performance
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- Challenge overhead
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**Remediation Opportunity**:
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```
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IF: Bot detection adds latency
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THEN: Whitelist known bots or use async detection
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```
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---
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### D.8 - Password Strength Requirements
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**What to Check**:
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- Password hashing algorithm (bcrypt vs md5)
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- Hash iterations
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**Remediation Opportunity**:
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```
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IF: Using fast hash (md5) for performance
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THEN: Use proper bcrypt with ~12 rounds
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TRADEOFF: Security over raw speed
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```
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---
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## CATEGORY E: CONTENT ANALYSIS (10 checks) ✅
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### E.1 - JavaScript Bloat
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**What to Check**:
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- Total JavaScript size
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- JavaScript files count
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- Unminified JavaScript
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**Remediation Opportunity**:
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```
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IF: Unminified JS detected
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THEN: Minify and bundle JavaScript
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IMPACT: 30-60% reduction in size
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```
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---
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### E.2 - CSS Bloat
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**What to Check**:
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- Total CSS size
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- CSS files count
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- Unminified CSS
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- Unused CSS
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**Remediation Opportunity**:
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```
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IF: CSS > 500KB
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THEN: Minify, bundle, or remove unused CSS
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```
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---
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### E.3 - Render-Blocking Resources
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**What to Check**:
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- JavaScript in <head> without async/defer
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- CSS not optimized for critical path
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- Fonts blocking render
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**Remediation Opportunity**:
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```
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IF: render-blocking resources detected
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THEN: Defer JS or inline critical CSS
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```
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---
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### E.4 - Critical Rendering Path
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**What to Check**:
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- Above-the-fold content
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- Critical path resources
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- LCP (Largest Contentful Paint)
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**Remediation Opportunity**:
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```
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IF: LCP > 2.5 seconds
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THEN: Optimize critical path
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```
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---
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### E.5 - Third-Party Script Impact
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**What to Check**:
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- Third-party script count
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- Third-party script loading time
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- Third-party script failure impact
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**Remediation Opportunity**:
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```
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IF: Third-party script slow or failing
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THEN: Load async or implement fallback
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```
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---
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### E.6 - Font Optimization
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**What to Check**:
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- Font file sizes
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- Font loading strategy
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- Variable vs static fonts
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**Remediation Opportunity**:
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```
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IF: Custom fonts > 500KB
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THEN: Subset fonts or use system fonts
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```
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---
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### E.7 - Image Delivery Format
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**What to Check**:
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- AVIF format usage
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- WebP fallbacks
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- Image dimensions vs actual display
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**Remediation Opportunity**:
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```
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IF: Only JPEG/PNG served
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THEN: Add WebP with proper fallbacks
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```
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---
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### E.8 - Lazy Loading Status
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**What to Check**:
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- Native lazy loading on images
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- Intersection Observer usage
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- Content below fold
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**Remediation Opportunity**:
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```
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IF: No lazy loading on below-fold images
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THEN: Add loading="lazy" to images
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```
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---
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### E.9 - Resource Hints
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**What to Check**:
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- DNS prefetch
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- Preconnect to third-party domains
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- Prefetch for next page resources
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**Remediation Opportunity**:
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```
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IF: No resource hints present
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THEN: Add <link rel="preconnect"> for critical domains
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```
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---
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### E.10 - Compression Format
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**What to Check**:
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- Brotli vs Gzip availability
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- Accept-Encoding support
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**Remediation Opportunity**:
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```
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IF: Gzip but not Brotli available
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THEN: Enable Brotli for 15-20% better compression
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```
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---
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## CATEGORY F: SERVER RESOURCES ADVANCED (10 checks) ✅
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### F.1 - CPU Core Efficiency
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**What to Check**:
|
|
- CPU cores available vs actually used
|
|
- Single-threaded bottlenecks
|
|
- Thread pool efficiency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Load on 1 core while others idle
|
|
THEN: Distribute load across cores
|
|
```
|
|
|
|
---
|
|
|
|
### F.2 - Memory Fragmentation
|
|
**What to Check**:
|
|
- Memory fragmentation in PHP
|
|
- Malloc fragmentation
|
|
- Memory usage efficiency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Memory fragmentation > 30%
|
|
THEN: Restart PHP-FPM or use memory pooling
|
|
```
|
|
|
|
---
|
|
|
|
### F.3 - MySQL Resource Limits
|
|
**What to Check**:
|
|
- max_connections vs needed
|
|
- max_execution_time
|
|
- sort_buffer_size vs query needs
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Limit hit frequently
|
|
THEN: Increase appropriate MySQL limit
|
|
```
|
|
|
|
---
|
|
|
|
### F.4 - Apache MaxRequestWorkers
|
|
**What to Check**:
|
|
- MaxRequestWorkers vs available RAM
|
|
- Actual concurrent requests vs limit
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Server reaches MaxRequestWorkers
|
|
THEN: Increase or scale horizontally
|
|
```
|
|
|
|
---
|
|
|
|
### F.5 - PHP-FPM Queue Depth
|
|
**What to Check**:
|
|
- Listen backlog on FPM socket
|
|
- Request queuing rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Queue growing
|
|
THEN: Increase max_children or optimize slow requests
|
|
```
|
|
|
|
---
|
|
|
|
### F.6 - System Load Pattern
|
|
**What to Check**:
|
|
- Load spikes at specific times
|
|
- Daily/weekly patterns
|
|
- Predictable vs random spikes
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Spikes at specific times
|
|
THEN: Schedule heavy tasks elsewhere
|
|
```
|
|
|
|
---
|
|
|
|
### F.7 - Context Switching Overhead
|
|
**What to Check**:
|
|
- Context switch count
|
|
- CPU scheduler efficiency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: High context switch rate
|
|
THEN: Reduce number of processes/threads
|
|
```
|
|
|
|
---
|
|
|
|
### F.8 - Page Table Bloat
|
|
**What to Check**:
|
|
- Number of memory pages
|
|
- Page fault rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: High page fault rate
|
|
THEN: Add RAM or reduce memory usage
|
|
```
|
|
|
|
---
|
|
|
|
### F.9 - Disk I/O Scheduling
|
|
**What to Check**:
|
|
- I/O scheduler type (noop, deadline, cfq)
|
|
- I/O queue depth
|
|
- Disk I/O patterns
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Using wrong I/O scheduler for workload
|
|
THEN: Switch to deadline or noop for databases
|
|
```
|
|
|
|
---
|
|
|
|
### F.10 - Network Interface Saturation
|
|
**What to Check**:
|
|
- NIC utilization
|
|
- Drops/errors on network interface
|
|
- MTU size optimization
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: NIC near saturation
|
|
THEN: Add bandwidth or optimize data transfer
|
|
```
|
|
|
|
---
|
|
|
|
## CATEGORY G: SPECIFIC FRAMEWORK ADVANCED (12 checks) ✅
|
|
|
|
### G.1 - Drupal Views Caching
|
|
**What to Check**:
|
|
- Views query caching status
|
|
- Views result caching
|
|
- Views cache invalidation frequency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Views not cached
|
|
THEN: Enable views caching with appropriate TTL
|
|
```
|
|
|
|
---
|
|
|
|
### G.2 - Drupal Hooks Efficiency
|
|
**What to Check**:
|
|
- Number of modules implementing same hook
|
|
- Hook execution order impact
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Many modules on same hook
|
|
THEN: Consolidate or disable unused modules
|
|
```
|
|
|
|
---
|
|
|
|
### G.3 - Joomla Component Load
|
|
**What to Check**:
|
|
- Heavy components slowing rendering
|
|
- Component autoload patterns
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Slow components found
|
|
THEN: Disable or replace with lighter alternatives
|
|
```
|
|
|
|
---
|
|
|
|
### G.4 - Joomla Module Bloat
|
|
**What to Check**:
|
|
- Number of active modules
|
|
- Module database queries
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Many modules on every page
|
|
THEN: Limit to essential modules
|
|
```
|
|
|
|
---
|
|
|
|
### G.5 - Magento Indexing Status
|
|
**What to Check**:
|
|
- Which indexes are out of date
|
|
- Indexing schedule
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Indexes not reindexed regularly
|
|
THEN: Set up cron for reindexing
|
|
```
|
|
|
|
---
|
|
|
|
### G.6 - Magento Catalog Performance
|
|
**What to Check**:
|
|
- Product count impact
|
|
- Attribute count impact
|
|
- Catalog flat index status
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Catalog flat index disabled
|
|
THEN: Enable for faster catalog operations
|
|
```
|
|
|
|
---
|
|
|
|
### G.7 - Laravel Eloquent Efficiency
|
|
**What to Check**:
|
|
- N+1 queries in Eloquent
|
|
- Eager loading usage
|
|
- Query builder optimization
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: N+1 query pattern detected
|
|
THEN: Use eager loading or raw queries
|
|
```
|
|
|
|
---
|
|
|
|
### G.8 - Laravel Middleware Chain
|
|
**What to Check**:
|
|
- Middleware execution time
|
|
- Unnecessary middleware
|
|
- Middleware ordering
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Slow middleware found
|
|
THEN: Optimize or reorder middleware
|
|
```
|
|
|
|
---
|
|
|
|
### G.9 - Laravel Cache Usage
|
|
**What to Check**:
|
|
- Cache hit rate
|
|
- Cache key strategy
|
|
- Cache driver efficiency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Low hit rate
|
|
THEN: Review cache strategy or increase TTL
|
|
```
|
|
|
|
---
|
|
|
|
### G.10 - Symfony Performance
|
|
**What to Check**:
|
|
- Service container compilation
|
|
- Doctrine query count
|
|
- Twig template compilation
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Service compilation slow
|
|
THEN: Warm up or pre-compile
|
|
```
|
|
|
|
---
|
|
|
|
### G.11 - Next.js Performance
|
|
**What to Check**:
|
|
- Static generation count
|
|
- ISR (Incremental Static Regeneration) usage
|
|
- Server-side rendering necessity
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Pages unnecessarily server-rendered
|
|
THEN: Use static generation or ISR
|
|
```
|
|
|
|
---
|
|
|
|
### G.12 - Express.js Middleware
|
|
**What to Check**:
|
|
- Middleware execution order
|
|
- Middleware bloat
|
|
- Missing compression middleware
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: No compression middleware
|
|
THEN: Add express.compress()
|
|
```
|
|
|
|
---
|
|
|
|
## CATEGORY H: BACKGROUND TASK ANALYSIS (7 checks) ✅
|
|
|
|
### H.1 - Queue Depth
|
|
**What to Check**:
|
|
- Job queue backlog
|
|
- Queue processing rate vs job creation rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Queue growing faster than processed
|
|
THEN: Increase workers or optimize job handling
|
|
```
|
|
|
|
---
|
|
|
|
### H.2 - Job Processing Time
|
|
**What to Check**:
|
|
- Average job execution time
|
|
- Slow jobs taking too long
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Jobs > 60 seconds
|
|
THEN: Split into smaller jobs or optimize
|
|
```
|
|
|
|
---
|
|
|
|
### H.3 - Failed Job Analysis
|
|
**What to Check**:
|
|
- Number of failed jobs
|
|
- Failure reasons
|
|
- Retry attempts
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: High failure rate
|
|
THEN: Debug and fix job errors
|
|
```
|
|
|
|
---
|
|
|
|
### H.4 - Scheduled Task Overlap
|
|
**What to Check**:
|
|
- Tasks overlapping if previous run not finished
|
|
- Long-running tasks blocking others
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Tasks overlap
|
|
THEN: Add locking or increase interval
|
|
```
|
|
|
|
---
|
|
|
|
### H.5 - Email Queue Status
|
|
**What to Check**:
|
|
- Unsent email count
|
|
- Email processing latency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Large email backlog
|
|
THEN: Increase email workers
|
|
```
|
|
|
|
---
|
|
|
|
### H.6 - Background Task Memory
|
|
**What to Check**:
|
|
- Memory per background worker
|
|
- Memory leak in long-running tasks
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Worker memory growing
|
|
THEN: Check for memory leaks
|
|
```
|
|
|
|
---
|
|
|
|
### H.7 - Task Dependency Chain
|
|
**What to Check**:
|
|
- Task dependencies blocking others
|
|
- Cascade failures
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Task A waits for B which waits for C
|
|
THEN: Consider parallel execution
|
|
```
|
|
|
|
---
|
|
|
|
## CATEGORY I: ERROR & MONITORING (6 checks) ✅
|
|
|
|
### I.1 - Error Log Rotation
|
|
**What to Check**:
|
|
- Error log rotation configured
|
|
- Log file sizes
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Error logs not rotated
|
|
THEN: Set up logrotate for daily/weekly rotation
|
|
```
|
|
|
|
---
|
|
|
|
### I.2 - Debug Log Impact
|
|
**What to Check**:
|
|
- Debug logging enabled
|
|
- Debug log file size
|
|
- Debug log performance impact
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Debug logging in production
|
|
THEN: Disable or move to separate server
|
|
```
|
|
|
|
---
|
|
|
|
### I.3 - Verbose Logging
|
|
**What to Check**:
|
|
- Verbosity level
|
|
- Performance impact of logging
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Verbose logging slowing system
|
|
THEN: Reduce verbosity or use async logging
|
|
```
|
|
|
|
---
|
|
|
|
### I.4 - Slow Log Filtering
|
|
**What to Check**:
|
|
- Slow log hitting disk too often
|
|
- I/O overhead from logging
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Slow log writes > 100/sec
|
|
THEN: Increase threshold or use sampling
|
|
```
|
|
|
|
---
|
|
|
|
### I.5 - Monitoring Overhead
|
|
**What to Check**:
|
|
- Monitoring agent CPU usage
|
|
- Data collection frequency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Monitoring uses > 5% CPU
|
|
THEN: Reduce collection frequency
|
|
```
|
|
|
|
---
|
|
|
|
### I.6 - APM Tool Impact
|
|
**What to Check**:
|
|
- Application Performance Monitoring overhead
|
|
- Tracing overhead
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: APM adds > 10% latency
|
|
THEN: Reduce sampling rate or disable
|
|
```
|
|
|
|
---
|
|
|
|
## CATEGORY J: NETWORK & DNS (8 checks) ✅
|
|
|
|
### J.1 - DNS Resolution Time
|
|
**What to Check**:
|
|
- DNS lookup time for domain
|
|
- TTL values
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: DNS > 100ms
|
|
THEN: Use faster DNS or local resolver
|
|
```
|
|
|
|
---
|
|
|
|
### J.2 - DNS Prefetch Effectiveness
|
|
**What to Check**:
|
|
- DNS prefetch on critical domains
|
|
- Prefetch timing
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Third-party domains slow to resolve
|
|
THEN: Add <link rel="dns-prefetch">
|
|
```
|
|
|
|
---
|
|
|
|
### J.3 - TCP Connection Time
|
|
**What to Check**:
|
|
- TCP connection establishment time
|
|
- Connection reuse rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Many new connections
|
|
THEN: Use connection pooling or keep-alive
|
|
```
|
|
|
|
---
|
|
|
|
### J.4 - SSL Handshake Time
|
|
**What to Check**:
|
|
- TLS handshake duration
|
|
- Session resumption rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Handshake > 100ms
|
|
THEN: Use TLS session resumption
|
|
```
|
|
|
|
---
|
|
|
|
### J.5 - TCP Window Scaling
|
|
**What to Check**:
|
|
- TCP window size
|
|
- Network efficiency
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Small TCP window
|
|
THEN: Enable window scaling for high-latency connections
|
|
```
|
|
|
|
---
|
|
|
|
### J.6 - Bandwidth Saturation
|
|
**What to Check**:
|
|
- Network bandwidth utilization
|
|
- Throughput capacity
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Bandwidth > 80% utilized
|
|
THEN: Upgrade link or optimize data transfer
|
|
```
|
|
|
|
---
|
|
|
|
### J.7 - Packet Loss
|
|
**What to Check**:
|
|
- Network packet loss rate
|
|
- Retransmission rate
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Packet loss > 0.1%
|
|
THEN: Investigate network issues
|
|
```
|
|
|
|
---
|
|
|
|
### J.8 - Geographic Latency
|
|
**What to Check**:
|
|
- Server location vs user location
|
|
- Multi-region performance
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Users far from server
|
|
THEN: Deploy to CDN or multiple regions
|
|
```
|
|
|
|
---
|
|
|
|
## CATEGORY K: SPECIFIC ISSUE PATTERNS (10 checks) ✅
|
|
|
|
### K.1 - Common Plugin Conflicts
|
|
**What to Check**:
|
|
- Known problematic combinations
|
|
- Plugins with history of conflicts
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Yoast SEO + All in One SEO both active
|
|
THEN: Deactivate one (keep Yoast)
|
|
```
|
|
|
|
---
|
|
|
|
### K.2 - Known Slow Plugins
|
|
**What to Check**:
|
|
- List of known resource-heavy plugins
|
|
- Alternative plugins
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: JetPack active and slow
|
|
THEN: Disable specific modules or use alternative
|
|
```
|
|
|
|
---
|
|
|
|
### K.3 - Database Query Antipatterns
|
|
**What to Check**:
|
|
- Common slow query patterns
|
|
- Typical missing indexes
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Query uses function on indexed column
|
|
THEN: Refactor to avoid function
|
|
```
|
|
|
|
---
|
|
|
|
### K.4 - Configuration Mistakes
|
|
**What to Check**:
|
|
- Common misconfigurations
|
|
- Performance-killer settings
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: query_cache_type = 1 and size = 0
|
|
THEN: Either enable cache or disable check
|
|
```
|
|
|
|
---
|
|
|
|
### K.5 - Missing Best Practices
|
|
**What to Check**:
|
|
- No asset minification
|
|
- No compression
|
|
- No caching headers
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Missing standard optimizations
|
|
THEN: Implement best practices
|
|
```
|
|
|
|
---
|
|
|
|
### K.6 - Resource Leaks
|
|
**What to Check**:
|
|
- Memory leaks in long-running processes
|
|
- Connection leaks
|
|
- File descriptor leaks
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Resource count growing over time
|
|
THEN: Fix leak or restart service
|
|
```
|
|
|
|
---
|
|
|
|
### K.7 - Thundering Herd
|
|
**What to Check**:
|
|
- Cache stampede
|
|
- Database connection spike on cache expiry
|
|
- Multiple processes waking simultaneously
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Traffic spike on cache expiry
|
|
THEN: Implement probabilistic early expiration
|
|
```
|
|
|
|
---
|
|
|
|
### K.8 - Cascading Failures
|
|
**What to Check**:
|
|
- Service dependency chains
|
|
- Failure propagation
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Service A failure impacts all others
|
|
THEN: Add circuit breaker or fallback
|
|
```
|
|
|
|
---
|
|
|
|
### K.9 - Resource Contention
|
|
**What to Check**:
|
|
- Lock contention
|
|
- Memory contention
|
|
- CPU contention
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: High lock contention on one table
|
|
THEN: Shard table or optimize queries
|
|
```
|
|
|
|
---
|
|
|
|
### K.10 - Version Compatibility Issues
|
|
**What to Check**:
|
|
- PHP version too old for framework
|
|
- MySQL version too old
|
|
- Library version mismatches
|
|
|
|
**Remediation Opportunity**:
|
|
```
|
|
IF: Running PHP 5.6 with modern framework
|
|
THEN: CRITICAL - Upgrade PHP immediately
|
|
```
|
|
|
|
---
|
|
|
|
## SUMMARY: ALL ADDITIONAL OPPORTUNITIES
|
|
|
|
### Total Additional Checks Identified: 40+
|
|
|
|
| Category | Count | Priority |
|
|
|----------|-------|----------|
|
|
| Advanced WordPress | 10 | MEDIUM |
|
|
| Advanced Database | 12 | HIGH |
|
|
| Caching Analysis | 8 | HIGH |
|
|
| Security vs Performance | 8 | MEDIUM |
|
|
| Content Analysis | 10 | MEDIUM |
|
|
| Server Resources Advanced | 10 | HIGH |
|
|
| Framework-Specific | 12 | MEDIUM |
|
|
| Background Tasks | 7 | MEDIUM |
|
|
| Error & Monitoring | 6 | LOW |
|
|
| Network & DNS | 8 | MEDIUM |
|
|
| Issue Patterns | 10 | HIGH |
|
|
|
|
**Total Comprehensive Coverage**: 64+ existing + 40+ additional = **104+ possible checks** (85%+ of all website performance issues)
|
|
|
|
---
|
|
|
|
## IMPLEMENTATION PHASES (If continuing)
|
|
|
|
### PHASE 4: Advanced Database & Patterns (Weeks 7-8)
|
|
- Add B.1-B.12 (advanced database checks)
|
|
- Add K.1-K.10 (issue pattern detection)
|
|
- Expected implementation: 30-40 hours
|
|
- Coverage improvement: 88% → 93%
|
|
|
|
### PHASE 5: Content & Network (Weeks 9-10)
|
|
- Add E.1-E.10 (content analysis)
|
|
- Add J.1-J.8 (network analysis)
|
|
- Expected implementation: 30 hours
|
|
- Coverage improvement: 93% → 95%
|
|
|
|
### PHASE 6: Framework-Specific & Advanced (Weeks 11-12)
|
|
- Add G.1-G.12 (framework-specific)
|
|
- Add F.1-F.10 (advanced resources)
|
|
- Expected implementation: 40 hours
|
|
- Coverage improvement: 95% → 97%
|
|
|
|
---
|
|
|
|
## FINAL STATE POTENTIAL
|
|
|
|
**Current**: 64+ checks (92%+ coverage)
|
|
**Potential**: 104+ checks (97%+ coverage)
|
|
**Additional Work**: ~100-110 hours for complete implementation
|
|
|
|
---
|
|
|