Benchmark: Totara Learning Solutions JavaScript

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 = []// Creates a new empty array.
    l1.forEach(function(i) { //loops through the first array input.
        if (u.indexOf(i) < 0) //If 'i' is not in the new array, it is pushed into the new array.
            u.push(i);
    });
    l2.forEach(function(j) { //loops through the second array input.
        if (u.indexOf(j) < 0) //If 'j' is not in the new array, it is pushed into the new array.
            u.push(j);
    });
    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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
forEach Test
usingSet 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36 OPR/90.0.4480.117

Browser/OS: Opera 90 on Windows

View result in a separate tab

Test name	Executions per second
forEach Test	2517104.0 Ops/sec
usingSet Test	936577.3 Ops/sec

Totara Learning Solutions JavaScript (version: 0)

Benchmarking the speed/performance between using forEach loops and concat() + Set()

Comparing performance of: forEach Test vs usingSet Test

Created: one year ago by: Guest

Jump to the latest result

forEach Test

usingSet Test

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A