Is there a performance difference between App_Code and bin?

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Two possible scenarios: your web code exists in a collection of classes, modules, etc. sitting in App_Code; or everything is compiled into an assembly that is referenced in bin. The code is specific to this web app, so questions about sharing can be put aside.

Is there a meaningful performance difference between these two situations?

Posted 13-May-10 6:21am

Gregory Gadow

Updated 13-May-10 14:52pm

Deeksha Shenoy

v4

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TheyCallMeMrJames · Accepted Answer · 2010-05-13T07:57:00

In my experience I have seen no difference with the compiled vs xcopy'd versions of deployment for performance, other than on the first request.

Once it's loaded into IIS, it's there in memory and I haven't observed a change (we switched a site once with about 150 simultaneous users and there didn't seem to be any difference at all...not sure if that scales).

Your biggest difference in performance will likely be if you compile/publish to release mode versus debug mode.

Cheers,
-James