---
title: "Ecommerce Core Web Vitals: the Biggest Stores Pass 36%, the Smallest 65% - PageSpeed Matters"
description: "We ranked online stores by popularity and expected the biggest, best-funded retailers to lead. Google's field data runs the other way: just 36% of the top stores pass on mobile, versus about 65% of the small ones, and the whole difference is responsiveness."
lang: en
json-ld:
---

[Ecommerce Core Web Vitals: the Biggest Stores Pass 36%, the Smallest 65%](https://www.pagespeedmatters.com/resources/data-studies/biggest-online-stores-core-web-vitals)

We ranked online stores by popularity and expected the biggest, best-funded retailers to lead. Google's field data runs the other way: just 36% of the top stores pass on mobile, versus about 65% of the small ones, and the whole difference is responsiveness.

Core Web Vitals pass rate by store popularity tier (mobile)

Top 1,000,000

66.3% 

Long tail

64.7% 

Top 100,000

50.8% 

Top 10,000

36% 

Source: Source: PageSpeed Matters analysis of 1.07 million stores with CrUX field data, May 2026.

Among online stores, popularity and passing move in opposite directions. The flagships carry the most.

Median tap response (INP) by store popularity tier (mobile)

Top 10,000

225 ms 

Top 100,000

175 ms 

Top 1,000,000

125 ms 

Long tail

100 ms 

Source: Source: PageSpeed Matters analysis, median mobile INP, May 2026. The passing threshold is 200 ms.

The median top store now sits past Google's 200 ms bar for responsiveness. The small store answers in a fraction of the time.

Source: [Ecommerce Core Web Vitals: the Biggest Stores Pass 36%, the Smallest 65% - PageSpeed Matters](https://www.pagespeedmatters.com/resources/data-studies/biggest-online-stores-core-web-vitals)