performance

Timestamps, marks, and measures via the Performance API, with a Date.now() fallback.

Import: @rtorcato/browser-common/performance

📖 MDN: Performance API · 📊 caniuse: user-timing

Browser support

API	Chrome	Edge	Firefox	Safari	iOS Safari	Baseline
Performance.mark	✅ 28+	✅ 12+	✅ 38+	✅ 11+	✅ 11+	Widely available
Performance.measure	✅ 28+	✅ 12+	✅ 38+	✅ 11+	✅ 11+	Widely available

✅ supported · ◐ partial · ❌ not supported · [n] see note. Generated from MDN browser-compat-data and web-features. caniuse: Performance.mark · Performance.measure

Example

import { isPerformanceApiAvailable, now, mark, measure } from '@rtorcato/browser-common/performance'

if (isPerformanceApiAvailable()) {
  mark('boot-start')
  const start = now()
  doWork()
  mark('boot-end')
  measure('boot', 'boot-start', 'boot-end')
}

Exports

• isPerformanceApiAvailable() — feature check
• now() — high-resolution timestamp in ms, falls back to Date.now()
• getPerformanceEntriesByType(type) — entries of a given type (e.g. 'resource', 'mark')
• mark(name) — records a named timestamp
• measure(name, startMark, endMark) — records the duration between two marks

See the API reference for full signatures.