The following line in 51Degrees.mobi.config adds 2-3 seconds of loading time to each of my ASP.NET MVC 4 project's controller actions:
<fiftyOne>
<log logFile="~/bin/App_Data/51Log.txt" logLevel="Info" />
...
</fiftyOne
The same thing happens for ASP.NET MVC 3. If I remove the <log> section, pages load almost instantly. I'm using the binary device database for detection like so:
<detection binaryFilePath="~/App_Data/51Degrees.mobi-Lite-2012.01.05.dat" />
Setting the logLevel to Debug causes the following exception:
`Storage scopes cannot be created when _AppStart is executing.`
Why does this cause such a drastic slowdown? Is it a symptom of a deeper problem?
Could there be an incompatibility with StructureMap for dependency injection?
Update: Thanks to @James Rosewell, I figured out why the logging slowed down my application. It's related to the logFile path. Everytime 51Degrees writes to the 51Log.txt file in the ~/bin directory, it causes IIS to recycle the pool and reload all the modules. Changing the log path to ~/App_Data solved the problem.
I have responded to this thread on the 51Degrees.mobi forum. Please go to this link.
http://51degrees.mobi/Support/Forum/tabid/65/forumid/2/threadid/1519/scope/posts/Default.aspx
Thanks,
James