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unshift() vs push() vs fill()
(version: 1)
Comparing performance of:
unshift vs push vs fill
Created:
one year ago
by:
Guest
Go to the latest result
Script Preparation code:
var array = Array(100000);
Tests:
unshift
let a = []; for(var i = 0; i < 100000; ++i) { a.unshift(i); }
push
let a = []; for(var i = 0; i < 100000; ++i) { a.push(i); }
fill
for(var i = 0; i < array.length; ++i) { array[i] = i; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
unshift
push
fill
Fastest:
N/A
Slowest:
N/A
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/136.0.0.0 Safari/537.36 Edg/136.0.0.0
Browser/OS:
Chrome 136 on Windows
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Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=605011" width="100%" height="500px"></iframe>
fill
3K/s
push
795/s
unshift
2/s
View exact numbers
Test name
Executions per second
✓
fill
2,987 Ops/sec
push
795 Ops/sec
unshift
2 Ops/sec
Related benchmarks
Array initialization: preallocate vs push
pop() vs shift() vs unshift vs pop
pop() vs shift() vs unshift vs pop #2
unshift() vs push() vs allocate-fill()
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