Run results for: conditional spread vs conditional mutate

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser: Chrome 112

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
conditional spread	44508652.0 Ops/sec
conditional mutation	964037760.0 Ops/sec

Tests:

conditional spread
const conditionallyAdd = (yes) => { return { something: 1, ...(yes ? { somethingAdded: 2 } : {}) } } conditionallyAdd(true) conditionallyAdd(false)
conditional mutation
const conditionallyMutate = (yes) => { const ret = { something: 1 } if (yes) ret.somethingAdded = 2 return ret } conditionallyMutate(true) conditionallyMutate(false)