Run results for: new Array(length).fill vs Array.from({ length })

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

new Array + fill

173K/s

Array.from

6K/s

View exact numbers

Test name	Executions per second
✓ new Array + fill	173,014 Ops/sec
Array.from	5,661 Ops/sec

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)
Array.from
Array.from({ length: ARRAY_LENGTH })