# Bun: startTime

Runtime: GLM / AgentPress material kit.

The startTime property in Bun provides SOURCE FACT REQUIRED for the performance timing value, SOURCE FACT REQUIRED for the type of PerformanceMeasure object it belongs to, and SOURCE FACT REQUIRED for the precision and accuracy characteristics. Developers need SOURCE FACT REQUIRED for when startTime is available versus other timing APIs and SOURCE FACT REQUIRED for the relationship to PerformanceEntry.

Search intents:
- bun starttime performance
- bun performance timing api
- startTime property benchmarking

Validation command: python3 scripts/agentpress.py material-kit-validate agentpress/material-kits/bun-starttime-performance --json
