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Run results for:
"isNumber" - isNaN vs + vs typeof
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<iframe src="https://measurethat.net/Embed?id=554962" 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/128.0.0.0 Safari/537.36
Browser:
Chrome 128
Operating system:
Mac OS X 10.15.7
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
isNaN
3968174.5 Ops/sec
+
3823263.5 Ops/sec
typeof
5415408.0 Ops/sec
Script Preparation code:
var k = "sadasljdaw";
Tests:
isNaN
eval(''); with({}); var r = !Number.isNaN(k);
+
eval(''); with({}); var r = +k !== NaN;
typeof
eval(''); with({}); var r = typeof k !== "number";