Run results for: for-in to hasOwnProperty vs Object.keys, then loop

Run details:
User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:63.0) Gecko/20100101 Firefox/63.0
Browser: Firefox 63
Operating system: Windows 8.1
Device Platform: Desktop
Date tested: 5 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:
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  var i;
  var key;
  var keys;
  var l;
  var value;
Tests:
for-in, then hasOwnProperty
for ( key in obj ) { if (obj.hasOwnProperty(key ) ) { value = obj[key]; } }
Object.keys, then loop
keys = Object.keys( obj ); i = keys.length; while( i--) { value = obj[ keys[ i ] ]; }
Run results for: for-in to hasOwnProperty vs Object.keys, then loop

for-in, then hasOwnProperty

Object.keys, then loop
