[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.