Run results for: Array item swapping, destructuring vs temp variable vs xor

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:134.0) Gecko/134.0 Firefox/134.0

Browser: Firefox Mobile 134

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Length 10 temp swap

4.0M/s

Length 10 xor swap

3.2M/s

Length 10 destructuring swap

2.9M/s

Length 100 temp swap

1.8M/s

Length 100 xor swap

1.4M/s

Length 100 destructuring swap

1.4M/s

Length 1000 xor swap

199K/s

Length 1000 destructuring swap

196K/s

Length 1000 temp swap

188K/s

View exact numbers

Test name	Executions per second
✓ Length 10 temp swap	3,996,484 Ops/sec
Length 10 xor swap	3,152,567 Ops/sec
Length 10 destructuring swap	2,946,591 Ops/sec
Length 100 temp swap	1,847,201 Ops/sec
Length 100 xor swap	1,386,054 Ops/sec
Length 100 destructuring swap	1,357,981 Ops/sec
Length 1000 xor swap	199,070 Ops/sec
Length 1000 destructuring swap	195,659 Ops/sec
Length 1000 temp swap	188,003 Ops/sec

Script Preparation code:

function tempSwap(array) {
    const length = array.length;
    const swap1 = Math.floor(Math.random() * length);
    const swap2 = Math.floor(Math.random() * length);
    const temp = array[swap1];

    array[swap1] = array[swap2];
    array[swap2] = array[temp];
}

function destructuringSwap(array) {
    const length = array.length;
    const swap1 = Math.floor(Math.random() * length);
    const swap2 = Math.floor(Math.random() * length);

    return [
        array[swap1],
        array[swap2]
    ] = [
        array[swap2],
        array[swap1]
    ];
}

function xorSwap(array) {
const length = array.length;
    const swap1 = Math.floor(Math.random() * length);
    const swap2 = Math.floor(Math.random() * length);
    array[swap1] ^= array[swap2];
    array[swap2] ^= array[swap1];
    array[swap1] ^= array[swap2];
}

Tests:

Length 10 temp swap
tempSwap(new Array(10));
Length 10 destructuring swap
destructuringSwap(new Array(10));
Length 100 temp swap
tempSwap(new Array(100));
Length 100 destructuring swap
destructuringSwap(new Array(100));
Length 1000 temp swap
tempSwap(new Array(1000));
Length 1000 destructuring swap
destructuringSwap(new Array(1000));
Length 10 xor swap
xorSwap(new Array(10));
Length 100 xor swap
xorSwap(new Array(100));
Length 1000 xor swap
xorSwap(new Array(1000));