Benchmark: Python range(a, b, n) in JavaScript

Script Preparation code:

function* range1(a, b, n = 1) {
	for (let i = a; i < b; i += n) yield i;
}

function range2(a, b, n = 1) {
	return Array.from({ length: Math.ceil((b - a) / n), map: (_, i) => start + i * n });
}

Tests:

Generator
let nn = 0; for (const n of range1(0, 10000, 5)) nn++;
Array
let nn = 0; for (const n of range2(0, 10000, 5)) nn++;
Raw loop
let nn = 0; for (let i = 0; i < 10000; i += 5) nn++;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Generator
Array
Raw loop

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/136.0.0.0 Safari/537.36 Edg/136.0.0.0

Browser/OS: Chrome 136 on Windows

View result in a separate tab

Raw loop

1.6M/s

Generator

43K/s

Array

23K/s

View exact numbers

Test name	Executions per second
✓ Raw loop	1,565,296 Ops/sec
Generator	43,362 Ops/sec
Array	22,587 Ops/sec

Python range(a, b, n) in JavaScript (version: 1)

Comparing performance of: `Generator vs Array vs Raw loop`

Created: one year ago by: Registered User

Go to the latest result

Generator

Array

Raw loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Python range(a, b, n) in JavaScript (version: 1)

Comparing performance of: Generator vs Array vs Raw loop

Created: one year ago by: Registered User

Go to the latest result

Generator

Array

Raw loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `Generator vs Array vs Raw loop`