Benchmark: new Array(length).fill().map vs Array.from({ length }, callback)

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

/*your preparation JavaScript code goes here
To execute async code during the script preparation, wrap it as function globalMeasureThatScriptPrepareFunction, example:*/
async function globalMeasureThatScriptPrepareFunction() {
    // This function is optional, feel free to remove it.
    // await someThing();
}
var arr = ['', '', ''];

const ARRAY_LENGTH = 10000;

Tests:

new Array + fill
new Array(ARRAY_LENGTH).fill(0).map((_, index) => index)
Array.from
Array.from({ length: ARRAY_LENGTH }, (_, index) => index)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new Array + fill
Array.from

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.2 Mobile/15E148 Safari/604.1

Browser/OS: Mobile Safari 18 on iOS 18.2.1

View result in a separate tab

Test name	Executions per second
new Array + fill	37061.2 Ops/sec
Array.from	67548.2 Ops/sec

Related benchmarks:

new Array(length).fill().map vs Array.from({ length }, callback) (version: 1)

Comparing performance of: new Array + fill vs Array.from

Created: one year ago by: Guest

Jump to the latest result

new Array + fill

Array.from

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A