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Run results for:
Filter Boolean vs. Custom Function
Testing the performance of the idiomatic .filter(Boolean) vs. filtering by a custom coercing function.
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<iframe src="https://measurethat.net/Embed?id=537248" width="100%" height="500px"></iframe>
Run details:
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36
Browser:
Chrome 127
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
2 years ago
Benchmark engine:
Benchmark.js
filter function
19K/s
filter(Boolean)
10K/s
View exact numbers
Test name
Executions per second
✓
filter function
18,749 Ops/sec
filter(Boolean)
10,118 Ops/sec
Script Preparation code:
var arr = Array.from({length: 10000}, () => Math.random() > 0.5 ? null : "foo");
Tests:
filter(Boolean)
const numTruthy = arr.filter(Boolean).length; console.log(numTruthy);
filter function
const numTruthy = arr.filter(x => !!x).length; console.log(numTruthy);