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Run results for:
flatten reduce vs for .. of vs reduce TCO
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<iframe src="https://measurethat.net/Embed?id=565515" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Browser:
Chrome 130
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
reduce TOC
140K/s
for of
125K/s
reduce
111K/s
View exact numbers
Test name
Executions per second
✓
reduce TOC
140,017 Ops/sec
for of
124,577 Ops/sec
reduce
111,057 Ops/sec
Tests:
reduce
const flatten = (arr) => arr.reduce((acc, x) => { Array.isArray(x) ? flatten(x).forEach(y => acc.push(y)) : acc.push(x) return acc; }, []) const x = flatten([ [1,2,3], [ [4,5,6], [7,8,9], [[[[[10,11,12]]], [13,14,15]]] ], [[[[[[[[[[[16,17,18]]]]]]]]]]] ]);
for of
const flat = (argarr) => { let arr = [] for (const item of argarr) { if (Array.isArray(item)) arr = arr.concat(flat(item)) else arr.push(item) } return arr } const x = flat([ [1,2,3], [ [4,5,6], [7,8,9], [[[[[10,11,12]]], [13,14,15]]] ], [[[[[[[[[[[16,17,18]]]]]]]]]]] ]);
reduce TOC
const flatten = (arr, acc = []) => { arr.forEach(x => { if (Array.isArray(x)) { flatten(x, acc); } else { acc.push(x); } }); return acc; }; const x = flatten([ [1,2,3], [ [4,5,6], [7,8,9], [[[[[10,11,12]]], [13,14,15]]] ], [[[[[[[[[[[16,17,18]]]]]]]]]]] ]);