jit - ASP.NET MVC Initial Load taking 10 minutes -

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i have simple mvc web app 4 controllers behaves fine on 1 windows 2008r2 server, on 2 new servers, 1 2008r2 , 1 windows 2012, takes extremely long time initial jit compile after publishing.

the normal server takes 10 seconds load after new version published, other servers take 10 minutes first page, , several minutes load first access of each controller. after initial compile pages load normally.

the app targets .net 4.5 cpu debug mode. server works , 1 of 'bad' servers have identical .net 4.6.1 installed, other has 4.5.2. 1 of 'bad' servers has .net core 1.0 installed. in procmon csc.exe shows under w3wp.exe 10 minutes, takes 0% cpu of time. no errors in event viewer. filemon doesn't show access errors.

what can cause extremely slow compile? else there check cause of problem?

problem caused antivirus settings on vmware host. excluding temporary asp.net files folder antivirus scan solved problem:

c:\windows\microsoft.net\framework64\v4.0.30319\temporary asp.net files


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