Synthetic interaction sub-parts and the Core Web Vitals
30.6% of audited sites (42,624) complete synthetic interactions in under 35ms (99% good field INP, 49ms median), while the 18.1% exceeding 110ms reach 55ms median field INP (99% good INP).
24.9% of sites use 65 to 110ms lab interaction duration synthetic interaction sub-parts, and 99% of those sites have a good INP, against 99% of all sites.
INP pass rate
Sites with 65 to 110ms lab interaction duration synthetic interaction sub-parts have a good INP most often: 99%, against 99% of all sites. Sites with 35 to 65ms lab interaction duration lab interaction time have it least often, at 99%.
Synthetic interaction sub-parts usage
Under 35ms lab interaction duration is the most used: 30.6% of sites. 65 to 110ms lab interaction duration is 24.9% of sites.
Synthetic interaction sub-parts per platform
On WordPress, 27% of sites use 65 to 110ms lab interaction duration synthetic interaction sub-parts, and 100% of WordPress sites have a good INP, against 99% of all sites. On Shopify, 34% of sites use under 35ms lab interaction duration, and 99% of Shopify sites have a good INP.
Adobe Commerce 800 sitesUnder 35ms lab interaction 31%35 to 65ms lab interaction 28%65 to 110ms lab interaction 28%Over 110ms lab interaction 13%100%
Wix 3,481 sitesUnder 35ms lab interaction 50%35 to 65ms lab interaction 27%65 to 110ms lab interaction 16%100%
Squarespace 1,907 sitesOver 110ms lab interaction 53%65 to 110ms lab interaction 22%Under 35ms lab interaction 14%35 to 65ms lab interaction 12%100%
Joomla 1,755 sitesUnder 35ms lab interaction 27%35 to 65ms lab interaction 26%65 to 110ms lab interaction 24%Over 110ms lab interaction 23%100%
Drupal 2,084 sitesUnder 35ms lab interaction 35%35 to 65ms lab interaction 29%65 to 110ms lab interaction 24%Over 110ms lab interaction 12%100%
WordPress 50,684 sites65 to 110ms lab interaction 27%Under 35ms lab interaction 26%35 to 65ms lab interaction 24%Over 110ms lab interaction 23%100%
Shopify 7,615 sitesUnder 35ms lab interaction 34%65 to 110ms lab interaction 26%35 to 65ms lab interaction 20%Over 110ms lab interaction 20%99%Synthetic interaction sub-parts or the platform
Does the platform explain the synthetic interaction sub-parts difference?
On WordPress, 100% of sites with 65 to 110ms lab interaction duration synthetic interaction sub-parts have a good INP, against 100% of WordPress sites with under 35ms lab interaction duration. Within WordPress, sites with 65 to 110ms lab interaction duration and under 35ms lab interaction duration have a good INP about equally often. On Shopify, 99% of sites with 65 to 110ms lab interaction duration synthetic interaction sub-parts have a good INP, against 100% of Shopify sites with under 35ms lab interaction duration. Within Shopify, sites with 65 to 110ms lab interaction duration and under 35ms lab interaction duration have a good INP about equally often.
How input delay, processing, and presentation add up
Every user tap or click waits for background main-thread tasks to finish (input delay), runs event callbacks (processing), and recalculates styles and paints the next frame (presentation). Across 42,624 sites (30.6%) under 35ms in lab interactions, 99% pass field INP at an 49ms median, versus 99% (55ms median) on the 18.1% (25,246) exceeding 110ms.
Understanding synthetic interaction sub-parts
Keep event handler processing lean and yield before forcing layout or paint updates so total interaction latency stays well below the 200ms INP threshold. Across all audited sites, 30.6% finish under 35ms (99% good INP, 49ms median) versus 18.1% above 110ms (99% good INP, 55ms median).
By Arjen Karel · 210,902 crawled sites (69,745 with desktop Chrome field data, 139,150 sites with synthetic interaction sub-parts, October 2026). How we measured.