Benchmark: Array item swapping, destructuring vs temp variable (throwaway destructuring)

Array item swapping, destructuring vs temp variable (throwaway destructuring) (version: 1)

Array destructuring vs temp variable use in array item swapping

Comparing performance of: Length 10 temp swap vs Length 10 destructuring swap vs Length 100 temp swap vs Length 100 destructuring swap vs Length 1000 temp swap vs Length 1000 destructuring swap

Created: one year ago by: Guest

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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);

    [
        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));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Length 10 temp swap
Length 10 destructuring swap
Length 100 temp swap
Length 100 destructuring swap
Length 1000 temp swap
Length 1000 destructuring swap

Fastest: N/A

Slowest: N/A

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/135.0.0.0 Safari/537.36 Edg/135.0.0.0

Browser/OS: Chrome 135 on Windows

View result in a separate tab

Test name	Executions per second
Length 10 temp swap	17986974.0 Ops/sec
Length 10 destructuring swap	24715506.0 Ops/sec
Length 100 temp swap	10699824.0 Ops/sec
Length 100 destructuring swap	13495602.0 Ops/sec
Length 1000 temp swap	2290509.5 Ops/sec
Length 1000 destructuring swap	2260521.2 Ops/sec

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