Benchmark: TestArrayAllocation - MeasureThat.net

Script Preparation code:

var array = new Array(1000000).fill(0);

function getObj() {
 	return {x: 0, Y: 0}; 
}

Tests:

1
for (let i = 0; i < array.length; i++) array[i] = getObj();
2
for (let i = 0; i < array.length; ++i) array[i] = getObj();
3
const l = array.length; for (let i = 0; i < l; ++i) array[i] = getObj();
4
for (const i in array) array[i] = getObj();
5
let i; for (i in array) array[i] = getObj();
6
const arr2 = array.map(_ => getObj());
7
const arr3 = []; for (let i = 0; i < 1000000; i++) arr3.push(getObj());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
1
2
3
4
5
6
7

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
1	6.6 Ops/sec
2	6.6 Ops/sec
3	9.8 Ops/sec
4	5.1 Ops/sec
5	5.2 Ops/sec
6	16.5 Ops/sec
7	14.4 Ops/sec