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Run results for:
Init array with fill map, vs for i loop
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?
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<iframe src="https://measurethat.net/Embed?id=562874" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0
Browser:
Firefox 131
Operating system:
Windows
Device Platform:
Desktop
Date tested:
one year ago
fill and map
9K/s
for
4K/s
View exact numbers
Test name
Executions per second
✓
fill and map
8,796 Ops/sec
for
3,576 Ops/sec
Script Preparation code:
var iterations = 10000;
Tests:
for
res = [] for (i = 0; i < iterations; i++) { res.push(i); }
fill and map
res = Array(iterations).fill(null).map((value, index) => index);