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                                  • I've found in the last few days that CodeRush for Roslyn in combination with StyleCop.Analyzers (nuget version) cause a painfull slowdown in VS2015 after ~1h of working on a mid-size solution.

                                    CodeRush alone works fine, and StyleCop.Analyzers works also fine. But in combination, the editor is so slow, that i see a real painfull delay between keyboard inputs.

                                    It feals like a 0.5-1sec between a keypress...
                                    Also Intellisense is delayed.

                                    Kind regards

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                                • Silvio Boehme 10.04.2016

                                  Visual Studio "About" Informations

                                  Microsoft Visual Studio Community 2015
                                  Version 14.0.25431.01 Update 3
                                  Microsoft .NET Framework
                                  Version 4.6.01586
                                  Installed Version: Community
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                                  Azure App Service Tools v2.9.5   14.0.20810.0
                                  Azure App Service Tools v2.9.5
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                                  This package contains the Data Lake integration nodes for Server Explorer.
                                  Azure Data Lake Tools for Visual Studio   2.1.0000.0
                                  Microsoft Azure Data Lake Tools for Visual Studio
                                  CodeRush for Roslyn
                                  DevExpress CodeRush for Roslyn package.
                                  Color Theme Designer   1.0
                                  Designer for creating new color themes
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                                  Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
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                                • Silvio Boehme 10.04.2016

                                  I have uploaded the results from PerfView to your ftp server.

                                • Alexander K (DevExpress) 10.04.2016

                                  Hi Silvio,

                                  We are concerned to hear that you faced this issue using our product. Thank you for providing the list of enabled extensions and PerfView log files. We greatly appreciate your cooperation in investigating this problem. Please give us some time to examine them.

                                  Also, we have another report about Visual Studio slowdown with similar symptoms but it is not related to the StyleCop.Analyzers extension. We have determined that the use of Spell Checker causes the issue in this case. It is possible that the issue you are experiencing has the same cause. To check it, follow these steps:

                                  1. Download and install the following build: DevExpress.CodeRush.Roslyn- The official 16.1.7 release has an issue with full disabling of the Spell Checker feature.
                                  2. From the Visual Studio menu, select "CodeRush\Options...".
                                  3. In the tree view on the left, navigate to the "Editor" folder.
                                  4. Select the "Spell checker" options page.
                                  5. Uncheck the "Enabled" item.
                                  6. Let us know whether slowdowns persist after Spell Checker is disabled.

                                  We are looking forward to hearing from you.

                                • Silvio Boehme 10.04.2016

                                  Hi Alexander,

                                  currently I had already disabled the Spell Checker. But with the attached build the performance is perfect.
                                  I enabled the Spell Checker in this build as a quick check, and the slow down is right back.

                                  I don't know how this is related to StyleCop. I will repeat this with SpellChecker enabled and remove StyleCop from my solution ... and give an update.


                                • Silvio Boehme 10.04.2016

                                  Update for New Build, SpellChecker enabled and StyleCop.Analyzers(nuget) removed

                                  The slowdown is noticeable, but very weak on my machine. Maybe it's the pure number of analyzers?
                                  I have StyleCop.Analyzers and Refactoring Essentials (both as nuget) included in my project.
                                  With all this stuff enabled and SpellChecker turned on it's impossible to work, because the keyboard delay is so big.

                                  I will continue with build and disable the SpellChecker.


                                • Alexander K (DevExpress) 10.05.2016

                                  Hi Silvio,

                                  Thank you for the detailed explanation of your experience with build It confirms our assumption about the cause of the Visual Studio slowdowns on your side. In your provided PerfView log files, we also see that the Spell Checker code analysis takes a lot of time when CPU loading is active. As I mentioned earlier, the release 16.1.7 build has an issue with full disabling of the Spell Checker feature. It explains why the slowdowns persist even when Spell Checker is turned off.

                                  This issue has high priority for us and we will try to resolve it as soon as possible. We greatly appreciate your patience.

                                • Alexander K (DevExpress) 12.09.2016

                                  Hi Silvio,

                                  Thank you for your patience. We have found the cause of the slowdown with enabled Spell Checker on projects that use additional analyzers. We have resolved the issue and prepared the hotfix with these changes: DevExpress.CodeRush.Roslyn- We would greatly appreciate it if you install this build, enable the CodeRush Spell Checker feature and check whether it resolves the issue with slowdowns on your side.

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