Is your UserControl sluggish at loading?

blogs.msdn.com — Here's an interesting story about performance I had the chance to work on over the last couple of weeks. The object of the call was a UserControl embedded in Internet Explorer, which was very slow to load the first time you browsed the page, but then was performing quite well after that long delay (around 60 seconds); unfortunately closing and reopening the browser caused another 60 seconds delay, which was quite bothering if not frustrating for end users... As you can imagine the control needs to be downloaded, JIT compiled and loaded which of course requires some time depending on how big is the control, how fast (or slow) the Internet connection, how powerful the client etc..., but those 60 seconds where definitely too much. Moreover on Vista we were prompted to run csc.exe and under some circumstances (usually if IE was not run as Administrator) we got a FileNotFoundException.

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