Run results for: Object.values overhead cost

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/134.0.6998.99 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 134

Operating system: iOS 18.3.1

Device Platform: Mobile

Date tested: one month ago

Test name	Executions per second
Call Object.values on each execution	98189.4 Ops/sec
Use shared Object.values	212237.0 Ops/sec

Script Preparation code:

var myObj = {};
for (var i = 0; i < 1000; i++) {
    myObj['val' + i] = 'val' + i;
}
var myObjValues = Object.values(myObj);

Tests:

Call Object.values on each execution
var curObjValues = Object.values(myObj); var myStr = ''; for (var i = 0; i < curObjValues.length; i++) { myStr += curObjValues[i]; }
Use shared Object.values
var curObjValues = myObjValues; var myStr = ''; for (var i = 0; i < curObjValues.length; i++) { myStr += curObjValues[i]; }

Run results for: Object.values overhead cost

Call Object.values on each execution

Use shared Object.values