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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36

Browser: Chrome 123

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

timestamp = Date.now();

4.8M/s

timestamp = performance.now();

3.2M/s

timestamp = new Date().toISOString();

967K/s

View exact numbers

Test name	Executions per second
✓ timestamp = Date.now();	4,768,101 Ops/sec
timestamp = performance.now();	3,232,396 Ops/sec
timestamp = new Date().toISOString();	967,030 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: