Fix: Double arithmetic syntax error in generate_comparison_report (line 2073)

modules/performance/nginx-varnish-manager.sh

@@ -31,6 +31,9 @@ if [ "$EUID" -ne 0 ]; then
     exit 1
 fi
 
+# Ensure reference database is fresh (only rebuild if > 1 hour old)
+db_ensure_fresh 2>/dev/null || true
+
 # Configuration
 BACKUP_DIR="/root/nginx-varnish-backups"
 VARNISH_VCL="/etc/varnish/default.vcl"
@@ -149,11 +152,28 @@ create_backup() {
     echo "$backup_path"
 }
 
-# Get list of cPanel domains
+# Get list of cPanel domains (from launcher cache, not filesystem)
 get_cpanel_domains() {
+    # Use launcher's cached domain list (instant lookup, already filtered by launcher)
+    # Fallback to filesystem scan only if cache unavailable
+
+    if command -v db_get_all_domains &>/dev/null; then
+        # Use cached data from launcher (built on startup, instant O(n) lookup)
+        db_get_all_domains 2>/dev/null || {
+            # Fallback if cache fails (shouldn't happen if db_ensure_fresh was called)
+            get_cpanel_domains_fallback
+        }
+    else
+        # Library not available, use filesystem fallback
+        get_cpanel_domains_fallback
+    fi
+}
+
+# Fallback domain discovery (only used if cache unavailable)
+get_cpanel_domains_fallback() {
     local domains=()
 
-    # Get domains from cPanel user data
+    # Fallback: Get domains from cPanel user data
     if [ -d /var/cpanel/userdata ]; then
         while IFS= read -r domain_file; do
             local domain=$(basename "$domain_file")