Once Claude can measure something, it can make it faster

一句话概要

Inside our performance sprint: the benchmarks Claude built, the loop each Slack thread ran, and the guardrails that let us ship 3,000 changes safely.

原文开头节选

Once Claude can measure something, it can make it faster. So we kept finding more things to measure.

This August, we made the core user experience of claude.ai and the Claude desktop app about 3x faster in a two-week sprint. Users had been telling us it was slow, and they were right. We ran everything from a single Slack channel, with Claude in every thread.

We focused on four journeys that make up 95% of user activity. At the 75th percentile, time to a typeable page on a fresh load of claude.ai went from 3.1 seconds to 0.55, starting a new Claude Code session went from 0.8 seconds to 0.3, and loading a Claude Cowork cloud session went from 2.6 seconds to 0.73. In aggregate, we estimate that saves tens of thousands of user-hours of waiting every day.

We used Claude Tag (beta), running an internal research model roughly comparable to Opus 5.5. Claude found bottlenecks, built benchmarks, shipped improvements, and watched every deploy. We steered by setting goals, making tradeoffs, and approving every change.

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