Run results for: Object.fromEntries vs reduce v2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.fromEntries	1859.6 Ops/sec
Reduce (mutate)	9558.4 Ops/sec
Reduce (spread)	44.3 Ops/sec

Website performance monitoring

Script Preparation code:

var data = [...Array(10000)].map((_, i) => [i, i]);

Tests:

Object.fromEntries
Object.fromEntries(data);
Reduce (mutate)
data.reduce((acc, [k, v]) => { acc[k] = v; return acc; }, {});
Reduce (spread)
data.reduce((acc, [k, v]) => ({ ...acc, [k]: v }), {});