Run results for: Object merging with spread operator

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.88 Safari/537.36

Browser: Chrome 79

Operating system: Mac OS X 10.15.1

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
empty obj	14641035.0 Ops/sec
non empty obj	15500580.0 Ops/sec
test 1	4030822.2 Ops/sec
test 2	5086025.5 Ops/sec

Script Preparation code:

function standard(oCol = {}) {
	return validate(oCol, 1, 2);
}        


function validate(oCol = {}, one, two) {
            const obj = {
              one: one,
			  two: two
            };
            return { ...oCol, ...obj };
        }

Tests:

empty obj
const empty = {}; const mergable = { one: 1, two: 2 }; const merged = { ...empty, ...mergable };
non empty obj
const nonEmpty = { zero: 0 }; const mergable = { one: 1, two: 2 }; const merged = { ...nonEmpty, ...mergable };
test 1
const obj = { zero: 0, ...standard() }
test 2
const obj = standard({ zero: 0 })

Run results for: Object merging with spread operator

empty obj

non empty obj

test 1

test 2