{"version":"2.0.63","anchor":"increased-startup-performance-telemetry-sampling","canonical_anchor":"increased-startup-performance-telemetry-sampling","heading":"Increased Startup Performance Telemetry Sampling","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.0.63\/e\/increased-startup-performance-telemetry-sampling","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.0.63","markdown":"### Increased Startup Performance Telemetry Sampling\n\n**What:** Startup performance telemetry sampling rate increased from 0.1% to 0.5% of CLI invocations.\n\n**Details:**\n\n- Constant changed from `OP9 = 0.001` to `Xa2 = 0.005`\n- Provides 5x more data points for analyzing real-world startup performance\n- Can still be forced on with `CLAUDE_CODE_PROFILE_STARTUP=1` environment variable\n- **Evidence:** `Xa2 = 0.005` at line 2661, sampling logic at line 2674"}