badregex

JavaScript performance comparison

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Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
 

Preparation code output

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Testing in unknown unknown
Test Ops/sec
regex-bad
var rtypenamespace = /^([^\.]*)?(?:\.(.+))?$/;
var types = '.delegateEventview3870';
var tns = rtypenamespace.exec(types) || [];
var type = tns[1];
var namespaces = (tns[2] || "").split(".").sort();
var special = jQuery.event.special[type] || {};
pending…
regex-good
var rtypenamespace = /^([^\.]*|)(?:\.(.+)|)$/;
var types = '.delegateEventview3870';
var tns = rtypenamespace.exec(types) || [];
var type = tns[1];
var namespaces = (tns[2] || "").split(".").sort();
var special = jQuery.event.special[type] || {};
pending…

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