How we made claude.ai 3x faster in two weeks · claude.dev
Science, Technology & Innovation · Sep 24, 2026
A human-governed deployment loop let AI deliver over 3,000 optimization changes in two weeks without reported customer incidents or rollbacks by combining automated review, human approval, testing, feature flags, telemetry, staged rollouts, and disciplined cleanup.
How we made claude.ai 3x faster in two weeks · claude.dev
Science, Technology & Innovation · Sep 24, 2026
AI-assisted performance work scaled by using causally validated, deterministic metrics as CI-enforced ratchets: optimizing instruction counts on two hot paths cut them 48% and 31%, reducing wall-clock time 78% and 44%, while preventing regressions and benchmark-only optimization.
How we made claude.ai 3x faster in two weeks · claude.dev
Science, Technology & Innovation · Sep 24, 2026
Claude.ai and the Claude desktop app became about 3× faster in two weeks by focusing on the four user journeys responsible for 95% of activity. Key 75th-percentile improvements included fresh claude.ai load-to-typeable time dropping from 3.1s to 0.55s, Claude Code session start from 0.8s to 0.3s, and Cowork cloud-session load from 2.6s to 0.73s. Techniques included server-rendering a static composer, precompiling a V8 code cache, preserving the composer during navigation, prefetching hovered sessions, and cutting sidebar rerenders by 90%, saving an estimated tens of thousands of user-hours daily.
How we made claude.ai 3x faster in two weeks · claude.dev
Science, Technology & Innovation · Sep 24, 2026
A deterministic 120 Hz Chrome rendering test enabled the team to eliminate streaming bottlenecks, reducing long-response main-thread blocking from ~750 ms to ~200 ms, cutting CPU use to one-third, sustaining 120 fps, and turning frame pacing into a nightly regression-tested property.