Run results for: Map from .reduce vs Map from .map vs Map from generator function

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; M2101K6G) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.115 Mobile Safari/537.36

Browser: Chrome Mobile 92

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Map from .reduce	716.3 Ops/sec
Map from .map	525.7 Ops/sec
Map from generator function	471.0 Ops/sec

Script Preparation code:

var arr10k = Array.from(Array(10000)).map((x, i) => ({ x1: i, x2: i * 2, x4: i * 4 }));

function* getItems() {
    for (const x of arr10k) {
        yield [x.x1, x];
    }
}

Tests:

Map from .reduce
arr10k.reduce((acc, x) => acc.set(x.x1, x), new Map());
Map from .map
new Map(arr10k.map(x => [x.x1, x]));
Map from generator function
new Map(getItems());