Run results for: Reflect.set vs Object.assign vs Direct assignment - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:86.0) Gecko/20100101 Firefox/86.0

Browser: Firefox 86

Operating system: Mac OS X 10.16

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Reflect.set	7324.6 Ops/sec
Object.assign	149.0 Ops/sec
Direct assignment	44282.8 Ops/sec

Website performance monitoring

Script Preparation code:

var numbers = Array(1000).fill(null).map((x, i) => i.toString());

Tests:

Reflect.set
numbers.reduce((acc, n) => Reflect.set(acc, n, n) && acc, {});
Object.assign
numbers.reduce((acc, n) => Object.assign(acc, { [n]: n }), {});
Direct assignment
numbers.reduce((acc, n) => { acc[n] = n; return acc }, {});