{"id":344,"slug":"pinterest-pwa-60pct-faster-2017","title":"Pinterest PWA rebuild (2017, foundational): 60% faster → +40% conversions, +40% time spent, +44% ad revenue","kind":"reference","scope":"business","status":"current","audiences":["claude-code","candid-team"],"topics":["core-web-vitals","measurement"],"reference_body":"**Claim:** Pinterest's mobile-web rebuild as a PWA delivered **60% faster** loads, **+40% conversions**, **+40% time spent**, **+44% ad revenue**.\n\n**Source:** Addy Osmani, \"A Pinterest PWA Performance Case Study\" (2017, foundational; results replicated in 2018-2025 case studies of similar mobile-web rebuilds).\n\n**Confidence:** Verified.\n\n**Use for:** the strongest single-site evidence that mobile performance investment compounds into revenue at scale. Pinterest at the time had the engineering resources to instrument it cleanly. SMB scale won't see 44% ad-revenue lifts (no ad revenue), but the conversion-and-engagement direction generalizes.","rationale_body":null,"metadata":null,"links":{"outgoing":[{"slug":"vodafone-31pct-lcp-8pct-sales-2021","title":"Vodafone A/B test (2021): 31% LCP improvement → 8% more sales, 15% better lead-rate, 11% better cart-rate","kind":"reference","scope":"business","link_type":"relates-to"}],"incoming":[{"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":"2026-05-22T20:03:33.338Z","updated_at":"2026-05-22T20:03:33.338Z"}