Benchmark: Reduce vs Object.groupBy with function

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Previous results

Test case name	Result
New native groupBy
Old native reduce

Latest run results:

Run details: (Test run date: one year ago)

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/OS: Chrome 136 on Mac OS X 10.15.7

Old native reduce

652/s

New native groupBy

115/s

View exact numbers

Test name	Executions per second
✓ Old native reduce	652 Ops/sec
New native groupBy	115 Ops/sec

Reduce vs Object.groupBy with function (version: 1)