Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36
Chrome 69
Mac OS X 10.14.0
Desktop
6 years ago
Test name Executions per second
for...in 2465.1 Ops/sec
Object.keys+forEach (ES5) 3423.7 Ops/sec
for...of - keys (ES6) 3565.3 Ops/sec
for...of - values (ES6) 3179.7 Ops/sec
for...of - entries (ES8) 2579.3 Ops/sec
Object.entries (ES8) 2583.2 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)