Perf win of the day: Claude Code CLI now uses 2x less CPU at p99.
Bun's garbage collector was running on a fixed timer, so it would kick in mid-turn and steal CPU right when Claude Code was busiest. Now it waits until the process is idle.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
Why it matters
Anyone running Claude Code in CI or on constrained machines gets the win by updating, and the timer-versus-idle GC diagnosis generalizes to other Bun-hosted AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → runtimes.
