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Array for vs fill vs map
(version: 1)
People tend to use array fil and then foreach, we know foreach is faster than a for loop, but is it also faster if you use array fill first?
Comparing performance of:
fill then edit with for vs map vs for loop
Created:
8 months ago
by:
Guest
Go to the latest result
Script Preparation code:
var iterations = 10000;
Tests:
fill then edit with for
const array = new Uint8Array(iterations).fill(0); for(let i=0;i<iterations;i+=2) array[i]=1;
map
new Uint8Array(iterations).map((_, i) => i%2?0:1);
for loop
const array = new Uint8Array(iterations); for(let i=0;i<iterations;i++) array[i]=i%2?0:1;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
fill then edit with for
map
for loop
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
7 months ago
)
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36 Edg/143.0.0.0
Browser/OS:
Chrome 143 on Windows
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=622557" width="100%" height="500px"></iframe>
fill then edit with for
83K/s
for loop
41K/s
map
12K/s
View exact numbers
Test name
Executions per second
✓
fill then edit with for
82,783 Ops/sec
for loop
40,761 Ops/sec
map
11,871 Ops/sec
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Init array with fill map, vs for i loop
Array fill vs map
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