Benchmark: Format number | Regex vs Code V1.1

Script Preparation code:

var char = ' '
var count = 3

function formatNumber(num) {
    const arr = num.toString().split('');
    let it = 1;

    for (let i = arr.length - 1; i >= 1; i--) {
        if (it % count === 0) {
            arr.splice(i, 0, char);
        }
        it++;
    }
    return arr.join('');
}

function formatNumber1bis(num) {
    const arr = `${num}`.split('');
    let it = 1;

    for (let i = arr.length - 1; i >= 1; i--) {
        if (it % count === 0) {
            arr.splice(i, 0, char);
        }
        it++;
    }
    return arr.join('');
}

function formatNumber2(num) {
    return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, char);
}

function formatNumber2bis(num) {
    return `${num}`.replace(/\B(?=(\d{3})+(?!\d))/g, char);
}

Tests:

regex test (toString)
const numbers = [1, 100, 1000, 10000, 100000, 1000000, 10000000, 1000000000] for (let i = 0; i < numbers.length; i++) { formatNumber2(numbers[i]) }
code test (toString)
const numbers = [1, 100, 1000, 10000, 100000, 1000000, 10000000, 1000000000] for (let i = 0; i < numbers.length; i++) { formatNumber(numbers[i]) }
regex test ````
const numbers = [1, 100, 1000, 10000, 100000, 1000000, 10000000, 1000000000] for (let i = 0; i < numbers.length; i++) { formatNumber2bis(numbers[i]) }
code test ````
const numbers = [1, 100, 1000, 10000, 100000, 1000000, 10000000, 1000000000] for (let i = 0; i < numbers.length; i++) { formatNumber1bis(numbers[i]) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex test (toString)
code test (toString)
regex test ````
code test ````

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36

Browser/OS: Chrome 119 on Windows

View result in a separate tab

Test name	Executions per second
regex test (toString)	828992.1 Ops/sec
code test (toString)	361758.6 Ops/sec
regex test ````	843923.6 Ops/sec
code test ````	366206.4 Ops/sec

Format number | Regex vs Code V1.1 (version: 1)

Regex VS Code for number format

Comparing performance of: regex test (toString) vs code test (toString) vs regex test ```` vs code test ````

Created: one year ago by: Registered User

Jump to the latest result

regex test (toString)

code test (toString)

regex test ````

code test ````

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A