Back to All Research Studies
Primary DatasetSample: 500 active production domains•March 2026
The State of WordPress Performance 2026: 500-Site Empirical Benchmark
An empirical teardown of mobile Core Web Vitals, page weight, DOM depth, and cache hit ratios across production websites.
32%Mobile LCP Pass Rate160 of 500 sites met the 2.5s LCP threshold at the 75th percentile
3.4MBMedian Mobile Page WeightDriven primarily by uncompressed media and third-party marketing pixels
380msAverage Server TTFBMeasured across 8 geographic testing regions
1,420Average DOM Node CountHigher node counts correlated with complex visual page builders
Executive Summary & Empirical Findings
Our engineering lab audited 500 active WordPress domains across varying traffic tiers to measure real-world performance, plugin weight, and mobile Largest Contentful Paint compliance.
Core Technical Conclusions:
- 68% of audited WordPress sites in our sample did not meet Google-s mobile Largest Contentful Paint target (LCP <= 2.5s).
- The median WordPress site in our cohort shipped 1.8MB of JavaScript, with 62% marked as unexecuted during initial viewport render.
- Sites built on lightweight native block themes (GeneratePress, Kadence) averaged significantly lower mobile LCP times than those on legacy drag-and-drop builders.
- Sites configured with server-level edge HTML caching demonstrated an average TTFB of 145ms versus 620ms on standard shared hosting environments.
Testing Methodology & Reproducibility
All 500 URLs were crawled using headless Chromium instances emulating a mid-tier mobile profile (Moto G4 on a simulated 4G network) following W3C Navigation Timing standards. Results represent multiple runs with warm and cold cache states.
Want custom performance telemetry for your site?
Run our in-browser diagnostic tools or test your site with VitalsSniper PRO.