# Taimaa.net browser countdown benchmark v1

Status: **go**  
Captured: 2026-08-11T13:21:53.009Z  
Environment: Chrome/151.0.7922.108; macOS 26.5.1 (25F80); Mac17,4

Suggested citation: Taimaa.net, “JavaScript Timer の精度：ブラウザ倒計時の状態復元ベンチマーク,” v1, 2026-08-11, https://taimaa.net/research/javascript-timer-accuracy#benchmark-v1-scope-and-result

Files in this immutable release:

- `methodology.md`: frozen protocol and metric definitions
- `observations.csv`: callback-level paired observations, including warm-ups
- `summary.json`: machine-readable environment, gate and descriptive summaries
- `limitations.md`: explicit inference boundary
- `harness.html`: dependency-free browser harness
- `schema.json`: column and metric definitions
- `exclusions.csv`: all trials, warm-ups, exclusions and actual stall timing
- `checksums.txt`: SHA-256 manifest

Released v1 files are not overwritten. Corrections require a new release directory and a categorized changelog while preserving this URL.