{"id":341,"slug":"web-almanac-2025-mobile-page-weight-2-56mb","title":"Web Almanac 2025: median mobile page weight crossed 2,559 KB in July 2025 (+7.8% YoY)","kind":"reference","scope":"business","status":"current","audiences":["claude-code","candid-team"],"topics":["core-web-vitals","measurement"],"reference_body":"**Claim:** Median mobile home-page weight reached **2,559 KB** in July 2025; desktop **2,862 KB**. That's **+7.8% YoY**. Average mobile Total Blocking Time: **1,916 ms** — almost 10× the 200ms best-practice target.\n\n**Source:** HTTP Archive Web Almanac 2025 (Page Weight + Performance chapters); also cited via corewebvitals.io.\n\n**Confidence:** Verified.\n\n**The compounding tax framing:** the average page is getting heavier, not lighter. Every plugin update adds asset, every embed adds bytes, every \"modernization\" adds JS. **The race is being lost across the average web; the moat for disciplined teams widens.** A site that defends a 1.0 MB budget today is materially differentiated from the median 2.56 MB site, and the gap will be wider in 2027. See [[2026-performance-budget-smb-site]] for the budget framework.","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"web-almanac-2025-cwv-pass-rates","title":"Web Almanac 2025: 48% mobile / 56% desktop origins pass all 3 CWV; LCP is the bottleneck","kind":"reference","scope":"business","link_type":"relates-to"},{"slug":"web-almanac-2024-page-weight-per-cms","title":"Web Almanac 2024: median desktop page weight — WordPress 2,252 KB, Wix 2,560, Squarespace 3,323; 90th pct crosses 8 MB","kind":"reference","scope":"business","link_type":"relates-to"}],"incoming":[{"slug":"2026-performance-budget-smb-site","title":"Reference: 2026 performance budget — SMB marketing site (Candid default targets)","kind":"reference","scope":"business","link_type":"depends-on"},{"slug":"rule-enforce-performance-budgets-in-ci","title":"RULE: Performance budgets enforced in CI. Build fails on budget violation. Documented budgets without CI enforcement do not work.","kind":"rule","scope":"business","link_type":"depends-on"},{"slug":"research-brief-page-speed-moat","title":"Research brief: Page Speed as a Moat — why CWV separates the agencies from the freelancers (piece 9 of 15)","kind":"reference","scope":"business","link_type":"relates-to"}]},"created_at":"2026-05-22T20:03:33.318Z","updated_at":"2026-05-22T20:03:33.318Z"}