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Run results for:
filter vs filter(boolean) vs filter(!!)
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Run details:
User agent:
Mozilla/5.0 (iPhone; CPU iPhone OS 18_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.1 Mobile/15E148 Safari/604.1
Browser:
Mobile Safari 26
Operating system:
iOS 18.7
Device Platform:
Mobile
Date tested:
6 months ago
Test name
Executions per second
filter
19602854.0 Ops/sec
filter(boolean)
20155374.0 Ops/sec
filter(!!item)
18035482.0 Ops/sec
HTML Preparation code:
<!--your preparation HTML code goes here-->
Script Preparation code:
var data = [{}, {}, {e:1}, {d: 'ed'}, null, {}, {}, {e: {}}, {e: {r: null}}, undefined, {}, null, null, undefined, {f: null}, null];
Tests:
filter
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ data.filter(item => item !== null)
filter(boolean)
data.filter(Boolean)
filter(!!item)
data.filter(item => !!item)