Run details:
Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0
Firefox 63
Windows 8.1
Desktop
6 years ago
Test name Executions per second
for-in, then hasOwnProperty 9860.5 Ops/sec
Object.keys, then loop 6171.2 Ops/sec
Script Preparation code:
Tests:
  • for-in, then hasOwnProperty

  • Object.keys, then loop