Run results for: Some vs Filter Vs FindIndex

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36

Browser: Chrome 115

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Default	1783982080.0 Ops/sec
reducer	1048914304.0 Ops/sec
forLoop	1807914752.0 Ops/sec
Foreach	1804217984.0 Ops/sec
Filter	1780095104.0 Ops/sec
Reduce with object	1785162880.0 Ops/sec

Script Preparation code:

var mixedArray = [];
for (var i = 0; i < 10000; i++) {
  mixedArray.push({
    first: Math.random() > 0.5 ? `first${i}` : undefined,
    second: Math.random() > 0.5 ? Date.now() : undefined
  });
}

Tests:

Default
function defaultSort(a) { const b = a .map((c, d) => ({ c, originalIndex: d })) .filter(({ c }) => c.first !== undefined); if (!b.length) return []; const c = b.filter(({ c }) => c.second !== undefined); if (!c.length) return []; if (c.length === b.length) return []; return b.map(({ originalIndex }) => originalIndex); }
reducer
function reducer(a) { return a.reduce((acc, c, i) => { if (c.first !== undefined && c.second === undefined) { acc.push(i); } return acc; }, []); }
forLoop
function forLoop(a) { let result = []; for (let i = 0; i < a.length; i++) { if (a[i].first !== undefined && a[i].second === undefined) { result.push(i); } } return result; }
Foreach
function forEachMethod(arr) { let result = []; arr.forEach((item, index) => { if (item.first !== undefined && item.second === undefined) { result.push(index); } }); return result; }
Filter
function filterMethod(arr) { return arr .map((item, index) => (item.first !== undefined && item.second === undefined) ? index : -1) .filter(index => index !== -1); }
Reduce with object
function reduceObject(arr) { return arr.reduce((acc, curr, i) => { if (curr.first !== undefined && curr.second === undefined) { acc.push(i); } return acc; }, []); }

Run results for: Some vs Filter Vs FindIndex

Default

reducer

forLoop

Foreach

Filter

Reduce with object