Run results for: Reduce vs Object.groupBy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Old native reduce

495/s

New native groupBy

68/s

View exact numbers

Test name	Executions per second
✓ Old native reduce	495 Ops/sec
New native groupBy	68 Ops/sec

Script Preparation code:

var max2 = 100000;

var data = [];
for (var i = 0; i <= max2; i++) { data.push({ id: i }); }

Tests:

New native groupBy
Object.groupBy(data, ({ id }) => id)
Old native reduce
data.reduce((acc, item) => { acc[item.id] = item; return acc; }, {})