Run results for: reducer vs fromEntries

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

reducer

2K/s

fromEntries

816/s

reducer with acc

0/s

View exact numbers

Script Preparation code:

vartest = test = Array(10000)
        .fill('')
        .map((_, i) => ({ key: 'key' + i, value: 'value' + i }));

Tests:

fromEntries
const result = Object.fromEntries(test.map(({ key, value }) => [key, value]));
reducer
const result2 = test.reduce((acc, { key, value }) => { acc[key] = value; return acc; }, {});
reducer with acc
const result3 = test.reduce((acc, { key, value }) => ({...acc, [key]: value}), {});