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

Run details:

User agent: Mozilla/5.0 (Android 12; Mobile; rv:120.0) Gecko/120.0 Firefox/120.0

Browser: Firefox Mobile 120

Operating system: Android

Device Platform: Mobile

Date tested: 10 months ago

Test name	Executions per second
Reflect.set	6454.1 Ops/sec
Object.assign	203.0 Ops/sec
Direct assignment	36826.7 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 }, {});