Benchmark: Array.map vs preallocation

Tests:

Map
const array2 = new Array(1000000).fill(0).map((item, index) => index);
Preallocation
const array2 = new Array(1000000).fill(0); for (let i = 0; i < array2.length; i++) array2[i] = i;

Rendered benchmark preparation results:

Previous results

Test case name	Result
Map
Preallocation

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Latest run results:

Run details: (Test run date: 21 hours ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser/OS: Chrome 124 on Windows

Test name	Executions per second
Map	53.6 Ops/sec
Preallocation	202.9 Ops/sec

Array.map vs preallocation (version: 0)