Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Chrome 81
Windows
Desktop
3 years ago
Test name Executions per second
for...in 2393.2 Ops/sec
Object.keys+forEach (ES5) 3558.1 Ops/sec
for...of - keys (ES6) 3545.0 Ops/sec
for...of - values (ES6) 3222.5 Ops/sec
for...of - entries (ES8) 2459.2 Ops/sec
Object.entries (ES8) 2400.6 Ops/sec
Script Preparation code:
Tests:
  • for...in

  • Object.keys+forEach (ES5)

  • for...of - keys (ES6)

  • for...of - values (ES6)

  • for...of - entries (ES8)

  • Object.entries (ES8)