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Run results for:
fill then map (with null/undefined/"") vs array.from
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=501877" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.0
Device Platform:
Mobile
Date tested:
2 years ago
Array.from() only
1.5M/s
.fill("").map()
972K/s
.fill(undefined).map()
964K/s
.fill(null).map()
963K/s
.fill(true).map()
919K/s
Array.from().map()
773K/s
View exact numbers
Test name
Executions per second
✓
Array.from() only
1,462,125 Ops/sec
.fill("").map()
972,410 Ops/sec
.fill(undefined).map()
964,239 Ops/sec
.fill(null).map()
962,643 Ops/sec
.fill(true).map()
919,106 Ops/sec
Array.from().map()
772,752 Ops/sec
Tests:
Array.from() only
Array.from({ length: 100 }, (_, i) => i+i);
Array.from().map()
Array.from({ length: 100 }).map((_, i) => i+i);
.fill("").map()
Array(100).fill("").map((_, i) => i+i);
.fill(null).map()
Array(100).fill(null).map((_, i) => i+i);
.fill(undefined).map()
Array(100).fill(null).map((_, i) => i+i);
.fill(true).map()
Array(100).fill(true).map((_, i) => i+i);