September 23, 2026
Claude.ai became 3x faster: the team did it in two weeks
On September 23, 2026, the Claude team reported: Claude.ai became 3 times faster in two weeks.

Boris Cherny
@bcherny
If you've noticed that claude.ai and the desktop app have become faster over the past few weeks, here's how we did it. The post collects plenty of useful findings and techniques for engineers speeding up their own apps.
We made claude.ai 3x faster in two weeks. Here’s how we use Claude to measure, debug and improve performance. Prompts and methods included. https://claude.dev/blog/how-we-made-claude-ai-faster/
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On August 2, John Gruber timed Claude launching on Mac: 30 seconds, with the rainbow cursor spinning for half that time. Now Boris Cherny reports that both Claude.ai and the desktop app have sped up.
**The engineering deep dive is for engineers.** The team used Claude to measure, debug, and improve performance. The post includes prompts and methods for people speeding up their own apps.
The deep dive publishes the prompts and methods the team used to measure, debug, and speed up Claude.ai.
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