Visual Studio 2015 is very slow

Question

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

My Visual Studio 2015 RTM was also very slow using ReSharper 9.1.2, but it has worked fine since I upgraded to 9.1.3 (see ReSharper 9.1.3 to the Rescue). Perhaps a cue.

One more cue. A ReSharper 9.2 version was made available to:

refines integration with Visual Studio 2015 RTM, addressing issues discovered in versions 9.1.2 and 9.1.3

Try turning off the ReSharper Code Inspection from menu Options → Code Inspection → Setting and choosing Visual Studio IntelliSense (menu Option → Intellisense → General) instead of ReSharper IntelliSense will make it much faster.

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

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" />

If you're suffering due to ReSharper then below mentioned options may help.

Visual Studio configuration:

ReSharper may conflict with the other Visual Studio addins and extensions - in case of slowdowns, please try to disable the other addins one-by-one and check if it helps to speed up Visual Studio with ReSharper. Here are some examples of known compatibility issues with other addins:

Productivity Power Tools

VSCommands

Also, you may try turning off the following options under "Tools | Options | Environment | General": Automatically adjust visual experience based on client performance Use hardware graphics acceleration if available

ReSharper configuration.

Though ReSharper provides quite a few powerful and useful features, some of them can be tweaked or turned off in terms of improving the speed. Here are some examples:

Turn off Solution Wide Analysis (SWA) in "ReSharper | Options | Code Inspection | Settings", 'Analyze errors in whole solution' checkbox

Switch back to Visual Studio IntelliSense in "ReSharper | Options | Environment | IntelliSense | General" dialog Clearing caches for current solution in "ReSharper | Options | Environment | General" dialog

Here are the links:

• Visual Studio with ReSharper is slow

• Speeding up ReSharper (and Visual Studio)