Run results for: for-in vs object.keys4112

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for-in	75.2 Ops/sec
Object.keys	70.5 Ops/sec

Script Preparation code:

var obj = {
    item1: { isTexture: true },
    item2: { isTexture: false },
    item3: { isTexture: true },
    item4: { isTexture: false },
    item5: { isTexture: true },
    item6: { isTexture: false },
    item7: { isTexture: true },
    item8: { isTexture: true },
    item9: { isTexture: false },
    item10: { isTexture: true },
    item11: { isTexture: false },
    item12: { isTexture: true },
    item13: { isTexture: false },
    item14: { isTexture: true },
    item11: { isTexture: true },
    item21: { isTexture: false },
    item31: { isTexture: true },
    item41: { isTexture: false },
    item51: { isTexture: true },
    item61: { isTexture: false },
    item71: { isTexture: true },
    item81: { isTexture: true },
    item91: { isTexture: false },
    item101: { isTexture: true },
    item111: { isTexture: false },
    item121: { isTexture: true },
    item131: { isTexture: false },
    item141: { isTexture: true }
};

Tests:

for-in
for (var i=10000; i > 0; i--) { let texturesForIn = []; for (const key in obj) { const value = obj[key]; if (value && value.isTexture) { texturesForIn.push(value); } } }
Object.keys
for (var i=10000; i > 0; i--) { let texturesObjectKeys = []; const keys = Object.keys(obj); for (let i = 0; i < keys.length; i++) { const key = keys[i]; const value = obj[key]; if (value && value.isTexture) { texturesObjectKeys.push(value); } } }

Run results for: for-in vs object.keys4112

for-in

Object.keys