JS Built-ins
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performanceintermediate

performance — timeOrigin + now() is greater than 0

📖 Usage Example
typeof performance.timeOrigin  // → 'number'

timeOrigin is a plain number (DOMHighResTimeStamp) with sub-millisecond precision.

performance.timeOrigin + performance.now()

Adding timeOrigin (Unix ms timestamp) to performance.now() (elapsed ms) gives the approximate current Unix timestamp. The result is always positive.

Challenge: Verify that performance.timeOrigin + performance.now() is greater than 0.

💡 Hints (1)
  • • performance.timeOrigin + performance.now() approximates Date.now() with higher resolution