Run results for: Array.from length vs Array

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Array from sparse array

186K/s

Array.from length

22K/s

View exact numbers

Test name	Executions per second
✓ Array from sparse array	185,709 Ops/sec
Array.from length	21,745 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();
}

Tests:

Array.from length
Array.from({length: 10000}, (_, i)=>i)
Array from sparse array
Array.from(Array(1000), (_, i)=>i)