Run results for: Reduce vs Array.groupBy

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
New native groupBy	0.0 Ops/sec
Old native reduce	1175.4 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
data.groupBy(d => d.id)
Old native reduce
data.reduce((acc, item) => { acc[item.id] = item; return acc; }, {})