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[] spread vs mutation vs Object.assign for reduce callback
(version: 1)
Comparing performance of:
with spread operator vs with mutation vs with object assign
Created:
one year ago
by:
Registered User
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Tests:
with spread operator
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 10000).reduce((acc, num) => { return { ...acc, [num]: num } }, {})
with mutation
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 10000).reduce((acc, num) => { acc[num] = num return acc }, {})
with object assign
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 10000).reduce((acc, num) => { return Object.assign(acc, {[num]: num}) }, {})
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
with spread operator
with mutation
with object assign
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36
Browser/OS:
Chrome 134 on Mac OS X 10.15.7
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Test name
Executions per second
with spread operator
129.5 Ops/sec
with mutation
16887.0 Ops/sec
with object assign
408.1 Ops/sec
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