Run results for: forEach vs for of (with Iterator)

Run details:

User agent: Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36

Browser: Chrome 132

Operating system: Chrome OS 14541.0.0

Device Platform: Desktop

Date tested: one year ago

for of

33K/s

forEach

20K/s

View exact numbers

Test name	Executions per second
✓ for of	33,463 Ops/sec
forEach	19,668 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}

Tests:

forEach
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ const arr = new Array(1000); arr[Symbol.iterator]().forEach(v => { var a = v });
for of
const arr = new Array(1000); for (var v of arr) { var a = v }