brian.peiris.name http://brian.peiris.name Thu, 17 Mar 2011 21:04:01 +0000 en hourly 1 http://wordpress.org/?v=3.2 Defining JavaScript functions inside a loop http://brian.peiris.name/2011/03/defining-javascript-functions-inside-a-loop/ http://brian.peiris.name/2011/03/defining-javascript-functions-inside-a-loop/#comments Thu, 17 Mar 2011 19:16:00 +0000 brianpeiris http://brian.peiris.name/?p=6 One of the warnings that JSLint (and JSHint) can output is “Don’t make functions within a loop”. JSLint doesn’t provide any further information about the warning and a quick web-search only results in mentions of best-practice and wasting of resources. I preferred to see actual stats so I wrote up a small test using JSLitmus to benchmark the difference between defining a function inside a loop, outside a loop, outside a function and outside a function with a local reference. I’m not sure why Chrome suffers a drastic performance decrease when using a local reference to a global function but at least this provides some solid data for obeying the warning:

Firefox 4 RC

Google Chrome 10.0

Internet Explorer 9

 

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