Run results for: Object.fromEntries vs reduce for filtering keys

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36

Browser: Chrome 144

Operating system: Linux

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
Object.fromEntries	2461.5 Ops/sec
Reduce (reuse object)	3761.7 Ops/sec
Reduce (creating temporary objects)	77.2 Ops/sec

Script Preparation code:

var data = { ...Array.from(Array(10000).keys()) };

Tests:

Object.fromEntries
Object.fromEntries(Object.entries(data).filter((key, value) => value % 2 === 0));
Reduce (reuse object)
Object.entries(data).reduce((acc, [key, value]) => { if (value % 2 === 0) { acc[key] = value; } return acc; }, {});
Reduce (creating temporary objects)
Object.entries(data).reduce((acc, [k, v]) => ({ ...acc, ...(v % 2 === 0 && {[k]: v}) }), {});