Run results for: Object.assign vs ES 6 Spread, multiple use cases

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0

Browser: Firefox 105

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
ES 6 Spread, combining objects	1700050.0 Ops/sec
Object.assign, combining objects	2617085.0 Ops/sec
ES 6 Spread, cloning objects	2700934.0 Ops/sec
Object.assign, cloning objects	2760231.0 Ops/sec

Tests:

ES 6 Spread, combining objects
const a = { b: 'c', d: 'e', f: 'g' } const b = { c: 'd', e: 'f', g: 'h' } const c = { ...a, ...b }
Object.assign, combining objects
const a = { b: 'c', d: 'e', f: 'g' } const b = { c: 'd', e: 'f', g: 'h' } const c = Object.assign({}, a, b)
ES 6 Spread, cloning objects
const a = { b: 'c', d: 'e', f: 'g', g: 'h', i: 'j', j: 'k' } const b = { ...a }
Object.assign, cloning objects
const a = { b: 'c', d: 'e', f: 'g', g: 'h', i: 'j', j: 'k' } const b = Object.assign({}, a)