visual-studio-2015 - make - visual studio 2017 very slow debugging




Visual Studio 2015 is very slow (13)

I just finished the installation and the whole IDE is super slow. It seems like it's making some kind of heavy CPU calls in the background where the whole IDE literally freezes and becomes unresponsive for about 2-3 seconds.

I was not having this issue with Visual Studio 2013 Ultimate. I am running Visual Studio 2015 Professional.

Installed Add-Ons/Packages:

  • Node.js Tools
  • ReSharper

Anyone have any ideas?


Update PC Drivers

In my case, and I had bad lag doing the simplest of things, it helped to update my pc drivers. The system drivers are the foundation for everything.

I was fortunate that I have Dell and they have awesome website support to do this. I googled

dell <my model name> update drivers

or go to the drivers home page

I let it update all the drivers it wanted to (Dell driver update is pretty much automatic).

Much of the lag seems to have gone away.


After upgrading from VS2013, I found that when debugging in Visual Studio 2015, it would freeze, I unchecked "Tools>Options>Debugging>General>Enable Diagnostics Tools while debugging" It brought debugging sessions back to normal. While Diagnostics are useful, I don't need them all the time so if at any point I need them I can turn it back on.


I experienced that when downgrading (i.e. uninstalling and reinstalling) from VS 2015 Ultimate to VS 2015 Professional, the IDE was very sluggish and constantly froze.

Doing a new clone of the repository, or - as one of my collegues tried - cleaning out all files not in source control (in the case of Git git clean -xfd ), helped me get rid of the this problem. The IDE is now running smoothly again.

The assumption is that Ultimate leaves some files behind that cause this behaviour in Professional, but I have not been able to track down which.


I found that the Windows Defender Antimalware is causing huge delays. Go to Update & Security -> Settings -> Windows Defender. Open the Defender and in the Settings selection, choose Exclusions and add the "devenv.exe' process. It worked for me



I have experienced very slow edits with Visual Studio 2015 Community Edition especially while working with HTML (and Razor as well) and JavaScript. I was able to resolve the issue by removing the references in the "Scripts/_references.js" file of my ASP.NET MVC project. Furthermore, I disabled autosyncing in that file by adding this to the top of the _references.js file.

This solution causes Visual Studio's IntelliSense to not load show all the JavaScript references available. However, ReSharper's IntelliSense will work perfectly fine and fast.

/// <autosync enabled="false" />

In my case both 2015 express web and 2015 Community had memory leaks (up to 1.5 GB) froze and crashed every 5 minutes. But only in projects with Node js. what solved this issue for me was disabling the intellisense: tools--> options--> text editor-->Node.js--> intellisense-->intellisense level=No intellisense.

And somehow intellisense still works))


It is most likely because you uninstalled some SQL Server components Visual Studio is using. Though Visual Studio still works, it's very slow.

Just go to "Programs and Features" in the Control Panel and repair Visual Studio. The needed Visual Studio components will be installed again and Visual Studio will be back as fast as before.


Same issue here, Visual Studio 2015 Pro Update 2 on a brand new machine. The editor was extremely slow, typing like chewing gum.

The reason was ESET NOD32 Antivirus 9. It has a thing called "Host Intruder Prevention System (HIPS)" enabled by default. I don't know how useful it this, but it can be disabled or I just added a rule, to allow devenv.exe .

Now it's fine.


This answer might seem silly but I had my laptop's power plan set to something other than High performance (in Windows). I would constantly get out of memory warnings in Visual Studio and things would run a bit slow. After I changed the power setting to High performance, I no longer see any problem.


This might just help someone, in addition to what other answers have mentioned.

Clear the contents of AppData\Local\Microsoft\WebSiteCache folder.

In my case I had VS 2015 pro update 3 and this is what helped me speed up VS.


This seems silly but after deleting C:\Users\{User}\AppData\Local\Microsoft\WebSiteCache everything started going fast again. If you're out of options you can try that. It's the only thing that worked for me.


Try uninstalling either Node.js Tools for Visual Studio (NTVS) or the commercial add-on called ReSharper from JetBrains. Using both NTVS and Resharper causes memory leaks in Visual Studio 2015.

NTVS = Node Tools for Visual Studio





visual-studio-2015