Run results for: Map entires to object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0

Browser: Chrome 127

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Array.from().reduce() reusing object	338409.9 Ops/sec
Array.from(o, mapFn).reduce() reusing object	317173.8 Ops/sec
Entries from Array.from(o, mapFn).reduce()	299599.2 Ops/sec

Script Preparation code:

var data = new Map(Array.from({
    length: 25
}, (_, i) => {
    const v = Math.random() * 1000;
    return [v.toString(36), {
        currentValue: v
    }];
}));

Tests:

Array.from().reduce() reusing object
Array.from(data).reduce((obj, [name, { currentValue }]) => { obj[name] = currentValue; return obj; }, {});
Array.from(o, mapFn).reduce() reusing object
Array.from(data, ([name, { currentValue }]) => [name, currentValue]).reduce((obj, [name, value]) => { obj[name] = value; return obj; }, {});
Entries from Array.from(o, mapFn).reduce()
Object.fromEntries( Array.from(data, ([name, { currentValue }]) => [name, currentValue]), );

Run results for: Map entires to object

Array.from().reduce() reusing object

Array.from(o, mapFn).reduce() reusing object

Entries from Array.from(o, mapFn).reduce()