CMS performance
How the most-used CMS platforms perform on real-user Core Web Vitals data.
At a glance the headline numbers for CMS performance
How the most-used CMS platforms perform on real-user Core Web Vitals data.
The ranking sorted by INP at p75, fastest first
| # | CMS | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Wix | 88ms | 97.3% | 2,688 | |
| 2 | Squarespace | 92ms | 99.3% | 1,012 | |
| 3 | Joomla | 94ms | 95.2% | 1,224 | |
| 4 | Drupal | 102ms | 97.1% | 1,641 | |
| 5 | WordPress | 103ms | 98.1% | 30,809 | |
| 6 | Adobe Commerce | 120ms | 98.5% | 565 | |
| 7 | Shopify | 122ms | 96.1% | 4,047 |
Passing INP per CMS which group passes the INP most often
No CMS stands out: pass rates sit between 95% and 99%. computed
All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
One row per CMS, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.
Adobe Commerce leads on INP: 99% of its sites pass. Joomla trails at 95%. computed
Why this matters for the Core Web Vitals, and where to start fixing it
The CMS decides a lot about your Core Web Vitals before you write a line of your own code. It controls the HTML that ships, the scripts and styles that load by default, and how images are handled. Two sites on the same platform can score very differently depending on the theme and plugins, but the platform sets the starting point and the ceiling for how much you can tune.
Start with what the platform loads that you do not need. Strip the default scripts and styles that come with themes and plugins, defer the JavaScript that is not needed for the first paint, and make sure images go out in modern formats at the right size. On script-heavy platforms the biggest wins are usually in cutting and deferring what loads on every page.
How does your CMS affect Core Web Vitals?
Among the most-used CMS platforms, Wix reaches a good INP on 97.3% of sites; Shopify on 96.1%.
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.