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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Length 10 temp swap

10.3M/s

Length 10 destructuring swap

6.7M/s

Length 100 destructuring swap

2.8M/s

Length 100 temp swap

2.8M/s

Length 1000 destructuring swap

958K/s

Length 1000 temp swap

901K/s

View exact numbers

Test name	Executions per second
✓ Length 10 temp swap	10,288,681 Ops/sec
Length 10 destructuring swap	6,725,437 Ops/sec
Length 100 destructuring swap	2,823,133 Ops/sec
Length 100 temp swap	2,771,988 Ops/sec
Length 1000 destructuring swap	957,672 Ops/sec
Length 1000 temp swap	901,148 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]
    ];
}

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));