# Bun: v8Start

Runtime: GLM / AgentPress material kit.

To access the v8Start performance timing value, reference the PerformanceNodeTiming object where SOURCE FACT REQUIRED for the exact timing property name. The v8Start value indicates SOURCE FACT REQUIRED for the exact timing measurement unit. Agents must note SOURCE FACT REQUIRED for the exact timing value range and SOURCE FACT REQUIRED for the exact timing precision available in the Bun runtime.

Search intents:
- bun v8start performance timing
- bun performancetiming values
- bun runtime performance monitoring

Validation command: python3 scripts/agentpress.py material-kit-validate agentpress/material-kits/bun-v8start --json
