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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=501797" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 17
Operating system:
iOS 17.2.1
Device Platform:
Mobile
Date tested:
2 years ago
Array.from() only
2.2M/s
Array.from().map()
1.1M/s
.fill("").map()
776K/s
.fill(true).map()
775K/s
.fill(null).map()
771K/s
.fill(undefined).map()
770K/s
View exact numbers
Test name
Executions per second
✓
Array.from() only
2,181,121 Ops/sec
Array.from().map()
1,107,874 Ops/sec
.fill("").map()
775,912 Ops/sec
.fill(true).map()
775,500 Ops/sec
.fill(null).map()
771,327 Ops/sec
.fill(undefined).map()
770,056 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);