Anthropic Doubles Claude Desktop Startup Speed and Halves Claude Code CPU Usage

Anthropic has optimized Claude Desktop to start up twice as fast in the background, while also halving the CPU usage of the Claude Code CLI. These performance improvements were achieved by allowing full-speed JS engine execution during hidden startup and optimizing Bun's garbage collection timing. These updates significantly improve the developer experience by reducing latency and resource consumption, making local AI assistant tools more seamless and less disruptive to system performance. Claude Desktop now bypasses JS engine power-saving throttling during hidden background startup, while Claude Code CLI defers Bun's garbage collection to idle periods instead of running it on a fixed timer.