Benchmark: Javascript array deducplication 2.03

Script Preparation code:

var a = [1, 2, 3, 4, 5, 6, 5, 4];
var b = [6, 8, 2, 7, 6, 1, 4, 3];

function usingForEach(l1, l2) {
    let u = []

    l1.forEach(function(item) {
        if (u.indexOf(item) < 0)
            u.push(item);
    });

    l2.forEach(function(item) {
        if (u.indexOf(item) < 0)
            u.push(item);
    });

    return u;
};

function usingForEach2(l1, l2) {
    let u = []

    l1.forEach(function(item) {
        if (u.indexOf(item) == -1)
            u.push(item);
    });

    l2.forEach(function(item) {
        if (u.indexOf(item) == -1)
            u.push(item);
    });

    return u;
};

function usingSet(l1, l2) {
    let u = l1.concat(l2); // Joins the l1 and l2 arrays together using concatenation.
    return [...new Set(u)]; // Array is converted into a 'Set' in order to remove duplicates, then is converted back into an array using the spread operator.
};

Tests:

forEach Test
var test1 = usingForEach(a,b);
usingSet Test
var test2 = usingSet(a,b);
For each 2 test
var test1 = usingForEach2(a,b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach Test
usingSet Test
For each 2 test

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 (Linux; Android 12; SM-G991B Build/SP1A.210812.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/105.0.5195.136 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/380.1.0.17.108;]

Browser/OS: Chrome Mobile 105 on Android

View result in a separate tab

Test name	Executions per second
forEach Test	2558798.0 Ops/sec
usingSet Test	909406.4 Ops/sec
For each 2 test	2476248.0 Ops/sec

Javascript array deducplication 2.03 (version: 0)

electric boogaloo

Comparing performance of: forEach Test vs usingSet Test vs For each 2 test

Created: one year ago by: Guest

Jump to the latest result

forEach Test

usingSet Test

For each 2 test

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A