Running sites on localhost is extremely slow

Question

Having real trouble using my localhost to test sites  It runs extremely slowly  Sometimes it takes up to a minute to load a page  I m using Firefox and the sites I m testing run fine on other developers in my office s local machines   on the production server   I ve gone through the normal things  -   Disabled IPv6 Not running in debug mode Put the site in the highest app pool  High Isolated  on IIS 6  Taking of firewalls etc    The problem only seems to occur when hitting pages which contain some form of  net code in the code-behind   Appreciate that this a little bit of a vague topic   stab in the dark but would appreciate any sort of advice - it s horrible waiting a minute each refresh to try out a change   Cheers  Sean

User · Answer

The cause of this for me was that the project was located on a network drive. I moved the project to the C: drive and everything ran without any delay.

If the project is located on a network drive, try moving it to your local C: drive and try it again.

The performance increase is much more than you would expect from just network speed. I guess VS is continually accessing the files when debugging an ASP.NET MVC application. I was using VS 2017, ASP.NET MVC debugging on IIS Express and this worked for me.

I hope this helps.

User · Answer

I fixed this problem by editing config inc php file which is in phpmyadmin folder  specifically changed  cfg  Servers    i   host      localhost  to  cfg  Servers    i   host      127 0 0 1

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I just changed my hosts file from this   127 0 0 1       abc com au 127 0 0 1       def com au 127 0 0 1       hij com au   to   127 0 0 1       abc com au def com au hij com au      Note  The concatenated website line cant exceed a couple of hundred characters

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After building your project the website needs some time to walk through the new dll     It s normal that loading a webpage after rebuilding takes some time  This shouldn t happen when only changing something in for example javascript

User · Answer

This suggestion fixed it for me  Clear out the WebSiteCache in C  Users username AppData Local Microsoft WebSiteCache  http   blog geocortex com 2007 12 07 slow-visual-studio-performance-solved

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In my case  originally the following error was occurring      Cannot read configuration file due to insufficient permissions   I fixed the error by using the proposed solution and restarted the application through IIS Manager  The original error was gone but the application was taking forever to load  I gave the permissions to IIS IUSRS again but this time to the whole deployment folder  After this  the application was able to load though an error was showing up      This configuration section cannot be used at this path   After resolving the above-mentioned error using the solution  the application was finally loading without giving any error

User · Answer

Run the Process Monitor to see what resources Network  File  Registry  Threads  are being consumed and see any unnecessary resource remote https  costly file reads  are being consumed  I had similar problem  When I run the process monitor I found that my fusion log is enabled so there are many into the disk which delayed the loading of dll after disabling fusion log IIS Express it is faster

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If your using  Net then turning off debug in your Web Config is going to improve performance no end    lt compilation defaultLanguage  c   debug  false  batch  false  targetFramework  4 0  gt

User · Answer

I had the same problem with PHP  I solved it by changing  localhost  to  127 0 0 1  in database connection parameters like someone suggested here  https   serverfault com a 444338 62739   I think it may work for you too  give it a try

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I know the op was using an older version of IIS and this may not apply to him  but I m posting this as it might help others  I had the same problem and none of the above IPv6 or hosts file changes worked for me  My asp net MVC4 project was really slow after hitting F5 to refresh js changes on localhost  It was happening across all browsers - Chrome  FF  and IE  Eventually I realised I was running IIS Express 8 0 locally  and it turns out 8 0 is extremely slow when serving up js files and seems to be a bug  If I ran iisexpress on the command line and hit F5 I could see each js file took 4 or 5 seconds to load   I ended up uninstalling IIS 8 0 and installing IIS express 7 5 and straight away the problem was fixed  Here are the steps I followed    Uninstall IIS express 8 0 Delete the IISExpress folder  on Win 7 it s in My Documents IISExpress  Install IIS express 7 5  Link to IIS Express 7 5 download    IIS Express 8 0 seems to be installed with VS 2012 so if you had a new install or possibly a service pack update this might upgrade the previous IIS Express version

User · Answer

I had same issues  edited my hosts file 127 0 0 1 localhost  but noticed no difference   I then disabled Compression in the IIS panel and applied  and problem appears to now be resolved   IIS Manager   Compression   Uncheck  Enable dynamic content compression  and uncheck  Enable static content compression    Then  Apply    Hope this helps   regards  Geoff

User · Answer

For people using a mac  When you re using different host names say test local and test2 local  Try changing test local to test dev  I found out that Mac OS X lion controls the  local tld  So when you change it to something else it s faster   And of course use above suggestions like turning off the ipv6 reference in your hosts file      1 localhost  and setting this in the hosts file  127 0 0 1   localhost  so it points to ipv4

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Disable the antivirus on the folders where is the code of the web application  In my case I have observed a big improvement with Avast antivirus

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If you are just viewing the page output  not debugging code  then go to the Web Config file and set debug to false  This changes load time from  15 secs to  lt 1 sec       lt system web gt           lt compilation debug  false  strict  false  explicit  true  targetFramework  4 0    gt                   lt  system web gt

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Just Sharing my solution    i changed the url in my browser from localhost port to 127 0 0 1 port which resulted in very fast loading

User · Answer

I m using Wamp Server  Windows 7 and a powerful machine   My Apache is configured to run from a different port other than port 80   I also access my local site not via  localhost   but a hostname mapped to my IP via dyn com   I believe the fact that I m running off of a different port than 80 seems to make Kaspersky s Web Anti-Virus feature very sensitive  since a lot of sketchy sites run off of different ports  and slows things down  Disabling it seems to have solved the issue

User · Answer

Try to enable the Bypass proxy server for local addresses  This works for all browsers installed  Firefox  Chrome  etc     Open Internet Explorer by clicking the Start button Picture of the Start button  In the search box  type Internet Explorer  and then  in the list of results  click Internet Explorer  Click the Tools button  and then click Internet Options  Click the Connections tab  and then click LAN settings  Select the Use a proxy server for your LAN check box  Select the Bypass proxy server for local addresses

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I was having the same issue  IIS initial loading would take up to 10 minutes instead of the usual 30 seconds   I opened up Task Manager to see what processes were running  Turns out Windows Defender would spike at 30  CPU usage when hitting the IIS endpoint for the first time  I tried excluding my  bin  folders but that did not work  so I just disabled real-time protection on Windows Defender and voil   the site was loading in just 30 seconds

[asp.net] Running sites on "localhost" is extremely slow

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