Run results for: unshift vs pop,push

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:137.0) Gecko/137.0 Firefox/137.0

Browser: Firefox Mobile 137

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

pop,push

12.9M/s

unshift

647K/s

View exact numbers

Test name	Executions per second
✓ pop,push	12,869,432 Ops/sec
unshift	646,867 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();
}
var arr = [42]

Tests:

unshift
arr.unshift(7)
pop,push
var a = arr.pop();arr.push(7);arr.push(a)