Wizz's Coding Solutions » Optimisation http://rainstorms.me.uk/blog Problems that I come across in day to day coding Thu, 07 Jul 2011 07:50:18 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 With Slows Down Code? http://rainstorms.me.uk/blog/2009/06/30/with-slows-down-code/ http://rainstorms.me.uk/blog/2009/06/30/with-slows-down-code/#comments Tue, 30 Jun 2009 18:34:38 +0000 wizzard http://rainstorms.me.uk/blog/2009/06/30/with-slows-down-code/ Yet Another Related Posts Plugin.]]> I just remembered something that happened a few years back in .NET 1.1 days (or maybe even it was .NET 1.0).

We were writing a rather complicated piece of code that needed to do lots of loops processing objects. Since it was taking an extremely long time, we ran it through a code profiler (a nice thing called ANTS Profiler – made by a company called Red Gate). One of the things that the profiler highlighted was that when we were using a With block to access a the return value of a function, every time the runtime used the With block to access the value, it was calling the function and taking extra time! This was a little surprising, as we had thought that With was dealt with at compile time, but apparently not. If my memory serves me correctly, I think that it was still slow when we assigned the return value of the function to a variable and used With to access that.

The basic upshot is that if you are in a situation where you are really bothered about speed, don’t use With to write code like that.

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