Script Preparation code:
AخA
 
var obj = new Object()
var keys = (new Array(10000)).fill(0).map((x, i) => { return i + 1 })
keys.forEach((x) => { obj['prop' + x] = x })
Tests:
  • For In

     
    for (var key in obj) {
      console.log(obj[key]);
    }
  • Object values

     
    for(let value of Object.values(obj)){
        console.log(value);
    }
  • Object keys forEach

     
    Object.keys(obj).forEach(key => console.log(obj[key]));
  • Object entries forEach

     
    Object.entries(obj).forEach(([key, value]) => console.log(key,'->',value));
  • object values forEach

     
    Object.values(obj).forEach(value => console.log(value));
  • cached length for loop

     
        const length = Object.keys(obj).lenght
        for (var i = 0; i < length ; i++) { 
            console.log(Object.values(obj)[i])
        }
Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Experimental features:

  • Test case name Result
    For In
    Object values
    Object keys forEach
    Object entries forEach
    object values forEach
    cached length for loop

    Fastest: N/A

    Slowest: N/A

Latest run results:
Run details: (Test run date: 2 years ago)
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Chrome 108 on Mac OS X 10.15.7
View result in a separate tab
Test name Executions per second
For In 21.5 Ops/sec
Object values 22.4 Ops/sec
Object keys forEach 23.3 Ops/sec
Object entries forEach 18.3 Ops/sec
object values forEach 23.8 Ops/sec
cached length for loop 879.0 Ops/sec