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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser: Chrome 138

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Length 10 destructuring swap

51.1M/s

Length 10 xor swap

42.6M/s

Length 10 temp swap

37.1M/s

Length 100 destructuring swap

19.9M/s

Length 100 xor swap

18.7M/s

Length 100 temp swap

17.3M/s

Length 1000 xor swap

2.1M/s

Length 1000 destructuring swap

2.1M/s

Length 1000 temp swap

2.1M/s

View exact numbers

Test name	Executions per second
✓ Length 10 destructuring swap	51,134,356 Ops/sec
Length 10 xor swap	42,583,972 Ops/sec
Length 10 temp swap	37,125,468 Ops/sec
Length 100 destructuring swap	19,916,174 Ops/sec
Length 100 xor swap	18,673,876 Ops/sec
Length 100 temp swap	17,258,888 Ops/sec
Length 1000 xor swap	2,143,282 Ops/sec
Length 1000 destructuring swap	2,105,556 Ops/sec
Length 1000 temp swap	2,075,959 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));