Run results for: Date.now() vs new Date().toISOString() vs performance.now();

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

timestamp = Date.now();

7.9M/s

timestamp = performance.now();

5.2M/s

timestamp = new Date().toISOString();

1.9M/s

View exact numbers

Test name	Executions per second
✓ timestamp = Date.now();	7,886,096 Ops/sec
timestamp = performance.now();	5,170,999 Ops/sec
timestamp = new Date().toISOString();	1,872,352 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: