KeenWP

Curated resource guide

WordPress Performance Optimization Resources

Improve WordPress performance through measurement rather than generic optimization checklists. This guide connects Core Web Vitals, server response time, PHP, database queries, caching, media, frontend assets, third-party scripts, profiling, real-user monitoring, and load testing into a repeatable performance workflow.

Scope

What this guide covers

  • Performance auditing methodology
  • frontend and backend bottlenecks
  • Core Web Vitals
  • server response time
  • PHP execution
  • database queries
  • object caching
  • page caching
  • CDN
  • browser caching
  • images
  • fonts
  • CSS
  • JavaScript
  • third-party scripts
  • REST/AJAX requests
  • cron
  • autoloaded options
  • plugins and themes
  • admin performance
  • logged-in users
  • WooCommerce
  • profiling tools
  • synthetic and real-user monitoring
  • performance budgets
  • load testing
  • before/after measurement
  • and avoiding placebo optimizations

Selected references

Curated resources

Links open the original publisher so you can use the complete, current material in context.

  1. 01
    5
    Recommended starting point

    WordPress Performance Handbook

    The WordPress performance team handbook connects measurement, Core work, field data, and practical contribution guidance.

    make.wordpress.org
  2. 02
    5

    WordPress Optimization Guide

    Official advice for diagnosing server, database, caching, file, and content-delivery bottlenecks in a WordPress stack.

    developer.wordpress.org
  3. 03
    5

    Lighthouse Overview

    Understand what Lighthouse audits measure, how lab results are produced, and where its findings fit into broader testing.

    developer.chrome.com
  4. 04
    5

    PageSpeed Insights API Overview

    Compare real-user Chrome data with lab diagnostics when prioritizing Core Web Vitals work.

    developers.google.com
  5. 05
    5

    Query Monitor

    See query timing, PHP errors, HTTP requests, hooks, scripts, and request context while diagnosing WordPress.

    wordpress.org
  6. 06
    5

    Performance Lab

    The WordPress performance team uses this plugin to test focused improvements before suitable features reach Core.

    wordpress.org
  7. 07
    4

    WebPageTest

    Run repeatable waterfall, filmstrip, geographic, device, scripting, and performance-regression tests against real pages.

    webpagetest.org