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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:105.0) Gecko/20100101 Firefox/105.0

Browser: Firefox 105

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.fromEntries	6862.1 Ops/sec
Reduce (mutate)	2950.9 Ops/sec
Reduce (spread)	0.2 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 }), {});