[May 2026] E-commerce Site Speed Ranking Released – Latest Insights from Top 452 Sites

Gaprise, Inc., a company specializing in digital business support, has released its e-commerce site loading speed ranking for May 2026.

## Survey Overview
- Survey Period: As of May 2026
- Conducted By: Internal research
- Target: Sites operated by the top 300 companies from the 85th Mail-Order/E-commerce Sales Ranking by Tsuhan Shimbun.
- Methodology: Using official Google Chrome User Experience Report datasets, LCP was measured for mobile devices on 4G networks at the domain level.

## Understanding LCP (Largest Contentful Paint)
LCP is a key metric under Google's Core Web Vitals, measuring the time taken for the main content of a page to render. While the standard threshold is 2.5 seconds, case studies from companies like Renault indicate that improvements yield significant results when LCP is reduced to under one second.

## Insights from the Ranking
Notably, 138 sites are currently outperforming major mega-EC platforms. As consumer expectations rise, matching industry leaders is no longer enough for differentiation.

## The Key to Performance Improvement
The factor creating a more than sixfold gap between top and bottom performers is Time To First Byte (TTFB). Sites achieving an LCP of under one second consistently maintain a TTFB of less than 0.5 seconds. While many companies focus on frontend optimization, the "one-second barrier" cannot be broken without addressing backend performance.

## Additional Information
Detailed data and improvement cases are available on the company media site, "MarTechLab." The company is also currently offering free website performance diagnostics.