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Run results for:
flatMap vs reduce with push vs filter x
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=616218" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36
Browser:
Chrome 138
Operating system:
Windows
Device Platform:
Desktop
Date tested:
11 months ago
reduce with push
17K/s
filter and map
13K/s
flatMap
5K/s
View exact numbers
Test name
Executions per second
✓
reduce with push
16,591 Ops/sec
filter and map
13,400 Ops/sec
flatMap
5,350 Ops/sec
HTML Preparation code:
<!--your preparation HTML code goes here-->
Script Preparation code:
var arr = Array.from({length:10000}, (v, i) => ({name: i, assigned: Math.random() < 0.5}));
Tests:
flatMap
arr.flatMap((o) => (o.assigned ? [o.name] : []));
reduce with push
arr.reduce((a, o) => (o.assigned && a.push(o.name), a), [])
filter and map
arr.filter((v) => v.assigned).map((v) => v.name)