Diagnosing Unindexed Slow Queries in MySQL 8.0 with EXPLAIN ANALYZE
How to pinpoint hidden table scans, missing composite indexes, and temporary table creation choking origin server throughput on high-traffic databases.
📂 Topic Hub • 9 Runbooks
Web & Core Web Vitals Runbooks
Surgical frontend engineering: eliminating DOM bloat, solving mobile INP interaction delays, and optimizing Largest Contentful Paint.
Eliminating WooCommerce wc-ajax=get_refreshed_fragments Performance Drag Without Breaking Cart Badges
Why WooCommerce fires a heavy, uncached admin-ajax request on every page load, how it sabotages your TTFB and Core Web Vitals, and the surgical script to disable it safely whilst keeping cart totals accurate.
Eliminating Render-Blocking CSS & Optimizing Critical Rendering Path
A surgical method to inline critical path CSS and defer secondary stylesheets, slashing First Contentful Paint (FCP) below 800ms.
6 min read
Fixing Interaction to Next Paint (INP) Delays Caused by Third-Party Scripts
How bloated marketing tags, hotjar heatmaps, and chat widgets locked up the browser main thread for 620ms on mobile button clicks, and how web worker offloading restored a sub-50ms green INP score.
Why Native loading="lazy" on Above-the-Fold Hero Images Destroys Your LCP (And How to Fix It)
WordPress and modern web frameworks now add loading="lazy" to all images by default. Here is why applying it to your primary hero banner adds 1,500ms of artificial latency to Largest Contentful Paint, and the exact code to fix it.
Eliminating Cumulative Layout Shift (CLS) Caused by Custom Web Fonts and FOIT/FOUT
Why swapping system fallbacks for custom web fonts shifts your entire page layout downwards, how font-display: swap can actually hurt your Core Web Vitals score, and how to achieve zero-CLS typography using modern font metric overrides.
Eliminating 3,400+ DOM Nodes on WooCommerce: The 60-FPS Mobile Checklist
A practical breakdown of how unpruned page builder wrappers, mega-menus, and redundant SVG icons pushed an online store's DOM to 3,400 nodes, and how pruning it to 640 nodes restored instant mobile scroll responsiveness.
6 min read
Fixing Redis Object Cache Bottlenecks & High Latency on WordPress
A forensic guide to resolving Redis connection timeouts, transient locking contention, and memory exhaustion that slow down WooCommerce checkouts.
Fixing TTFB > 2.5s on High-Traffic LiteSpeed Servers: Root Cause & Implementation
A forensic teardown of why a UK e-commerce store suffered 2,800ms server response times despite paying for premium hosting, and how a 3-step configuration surgical fix brought it down to 42ms.