Benchmark: JavaScript spread operator vs Object.assign vs mutation performance with condition #8

Tests:

Using the spread operator
const firstObject = { a: 'a', b: 'b', c: 'c', d: 'd', e: 'e', f: 'f', g: 'g' } const secondObject = { 0: 0, 1: 1, 2: 2, 3: 3, 4: '4', 5: '5', 6: '6', 7: '7' } const conditionState = Boolean(Object.keys(secondObject).length) const finalObject = { ...firstObject, ...(conditionState ? secondObject : {}), ...(conditionState ? secondObject : {}), ...(!conditionState ? secondObject : {}) };
Using Object.assign
const firstObject = { a: 'a', b: 'b', c: 'c', d: 'd', e: 'e', f: 'f', g: 'g' } const secondObject = { 0: 0, 1: 1, 2: 2, 3: 3, 4: '4', 5: '5', 6: '6', 7: '7' } const conditionState = Boolean(Object.keys(secondObject).length) const finalObject = Object.assign(firstObject, conditionState && secondObject, conditionState && secondObject, !conditionState && secondObject);
Using mutation
const firstObject = { a: 'a', b: 'b', c: 'c', d: 'd', e: 'e', f: 'f', g: 'g' } const secondObject = { 0: 0, 1: 1, 2: 2, 3: 3, 4: '4', 5: '5', 6: '6', 7: '7' } const conditionState = Boolean(Object.keys(secondObject).length) const finalObject = { a: firstObject.a, b: firstObject.b, c: firstObject.c, d: firstObject.d, e: firstObject.e, f: firstObject.f, g: firstObject.g } if (conditionState) { finalObject[0] = secondObject[0] finalObject[1] = secondObject[1] finalObject[2] = secondObject[2] finalObject[3] = secondObject[3] finalObject[4] = secondObject[4] finalObject[5] = secondObject[5] finalObject[6] = secondObject[6] finalObject[7] = secondObject[7] } if (conditionState) { finalObject[0] = secondObject[0] finalObject[1] = secondObject[1] finalObject[2] = secondObject[2] finalObject[3] = secondObject[3] finalObject[4] = secondObject[4] finalObject[5] = secondObject[5] finalObject[6] = secondObject[6] finalObject[7] = secondObject[7] } if (!conditionState) { finalObject[0] = secondObject[0] finalObject[1] = secondObject[1] finalObject[2] = secondObject[2] finalObject[3] = secondObject[3] finalObject[4] = secondObject[4] finalObject[5] = secondObject[5] finalObject[6] = secondObject[6] finalObject[7] = secondObject[7] }
Using iterable mutation
const firstObject = { a: 'a', b: 'b', c: 'c', d: 'd', e: 'e', f: 'f', g: 'g' } const secondObject = { 0: 0, 1: 1, 2: 2, 3: 3, 4: '4', 5: '5', 6: '6', 7: '7' } const conditionState = Boolean(Object.keys(secondObject).length) const finalObject = {} for (const key in finalObject) { finalObject[key] = firstObject[key] } if (conditionState) { for (const key in secondObject) { finalObject[key] = secondObject[key] } } if (conditionState) { for (const key in secondObject) { finalObject[key] = secondObject[key] } } if (!conditionState) { for (const key in secondObject) { finalObject[key] = secondObject[key] } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Using the spread operator
Using Object.assign
Using mutation
Using iterable mutation

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Windows

View result in a separate tab

Test name	Executions per second
Using the spread operator	130335.4 Ops/sec
Using Object.assign	135905.5 Ops/sec
Using mutation	734098.1 Ops/sec
Using iterable mutation	306423.4 Ops/sec

JavaScript spread operator vs Object.assign vs mutation performance with condition #8 (version: 0)

Comparing performance of: Using the spread operator vs Using Object.assign vs Using mutation vs Using iterable mutation

Created: one year ago by: Guest

Jump to the latest result

Using the spread operator

Using Object.assign

Using mutation

Using iterable mutation

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A