Object loops: for...in vs Object.keys+forEach (ES5) vs for...of (ES6) vs Object.entries (ES8)

2 years ago
User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:98.0) Gecko/20100101 Firefox/98.0
Test name Executions per second
for...in 24455.5 Ops/sec
Object.keys+forEach (ES5) 20842.1 Ops/sec
for...of - keys (ES6) 21032.7 Ops/sec
for...of - values (ES6) 36685.8 Ops/sec
for...of - entries (ES8) 12035.5 Ops/sec
Object.entries (ES8) 16925.6 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)

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