Benchmark: sumby with reduce vs by mapping first

Script Preparation code:

const arr = Array.from({ length: 100000 }, () => ({ rand: Math.random() }));

Tests:

map first
var b = arr.map((obj) => obj.rand).reduce((acc, curr) => acc + curr, 0);
just reduce
var b = arr.reduce((acc, curr) => acc + curr.rand, 0)

Rendered benchmark preparation results:

Previous results

Test case name	Result
map first
just reduce

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser/OS: Chrome 135 on Windows

just reduce

1K/s

map first

316/s

View exact numbers

Test name	Executions per second
✓ just reduce	1,036 Ops/sec
map first	316 Ops/sec

sumby with reduce vs by mapping first (version: 1)