Benchmark: flat() vs reduce.concat() vs es-toolkit flatten()

Tests:

reduce.concat()
const params = [[ 1, 2], ["hello", true, 7]]; const other = params.reduce((acc, val) => acc.concat(val));
flat()
const params = [[1, 2], ["hello", true, 7]]; const other = params.flat();
es-toolkit flatten()
function flatten(arr, depth = 1) { const result = []; const flooredDepth = Math.floor(depth); const recursive = (arr, currentDepth) => { for (let i = 0; i < arr.length; i++) { const item = arr[i]; if (Array.isArray(item) && currentDepth < flooredDepth) { recursive(item, currentDepth + 1); } else { result.push(item); } } }; recursive(arr, 0); return result; } const params = [[ 1, 2], ["hello", true, 7]]; const other = flatten(params);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser/OS: Firefox 144 on Ubuntu

reduce.concat()

13.2M/s

flat()

10.9M/s

es-toolkit flatten()

6.5M/s

View exact numbers

flat() vs reduce.concat() vs es-toolkit flatten() (version: 1)