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Array.from with mapper vs Array.fill
(version: 1)
Comparing performance of:
from with mapper vs fill twice
Created:
one year ago
by:
Guest
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Tests:
from with mapper
let n = 10000, length = 50 const result = [] const lengthObj = {length:length} const mapper = (_, i) => i < 25 ? 0 : 1 for (let i = 0; i < n; ++i) { result.push(Array.from(lengthObj, mapper)); }
fill twice
let n = 10000, length = 50 const result = [] for (let i = 0; i < n; ++i) { result.push(Array(5).fill(0, 0, 25).fill(1, 25)); }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
from with mapper
fill twice
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Mobile Safari/537.36
Browser/OS:
Chrome Mobile 132 on Android
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<iframe src="https://measurethat.net/Embed?id=584325" width="100%" height="500px"></iframe>
Test name
Executions per second
from with mapper
42.8 Ops/sec
fill twice
1709.9 Ops/sec
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Array.from vs Array.fill (zeroes)
Array.from vs map 1
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