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jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

Test case details

Title *

Description
(Markdown syntax is allowed)

Preparation Code

Preparation HTML
(this will be inserted in the <body> of a valid HTML5 document in standards mode)
(useful when testing DOM operations or including libraries)

Setup JSconst length = 1000

Teardown JS

Test cases

Test #1

Title *

Async

Code *const evenNumbers = Array.from({ length }, (_, i) => i * 2)

Test #2

Title *

Async

Code *const evenNumbers = Array.from({ length }).map((_, i) => i * 2)

Test #3

Title *

Async

Code *const evenNumbers = [...Array(length).keys()].map(i => i * 2)

Test #4

Title *

Async

Code *const evenNumbers = Array(length).fill(null).map((_, i) => i * 2)

Test #5

Title *

Async

Code *const evenNumbers = Array(length).fill(0).map((_, i) => i * 2)

Test #6

Title *

Async

Code *const evenNumbers = Array(length).fill(false).map((_, i) => i * 2)

Test #7

Title *

Async

Code *const evenNumbers = Array(length).fill().map((_, i) => i * 2)

Test #8

Title *

Async

Code *

const evenNumbers = []
for (let i = 0; i < length; i++) {
	evenNumbers.push(i * 2)
}