Vscode-cpptools: Extension causes high cpu load

[germinolegrand]

• Issue Type: Performance
• Extension Name: cpptools
• Extension Version: 0.21.0
• OS Version: Linux x64 4.9.0-8-amd64
• VSCode version: 1.31.1

ms-vscode.cpptools-unresponsive.cpuprofile.txt

Find more details here: https://github.com/Microsoft/vscode/wiki/Explain:-extension-causes-high-cpu-load

[WardenGnaw]

From the .cpuprofile, it is taking a long time to load a module. VS Code's solution is https://github.com/Microsoft/vscode/wiki/Explain:-extension-causes-high-cpu-load#code-loading

[sean-mcmanus]

@WardenGnaw So we should be using WebPack? Do we know how severe of an issue this is, i.e. how much of a benefit would be gained?

[WardenGnaw]

@sean-mcmanus We would have to do profiling on WebPacked code vs non-WebPacked code and see what the improvement is.

[germinolegrand]

Same notification while loading the same code folder (which is quite huge, tens of thousands of files, that might be of importance ?).

ms-vscode.cpptools-unresponsive.cpuprofile.txt

[WardenGnaw]

Time is still mostly spent doing module loads. Profiler is saying it is taking 2500 ms.

[philkuz]

I noticed in the messages that @sean-mcmanus is leaving on duplicate issues, there's apparently a fix to this issue in the upcoming release. Is there a branch where this is currently located?

Thanks!

[WardenGnaw]

@philkuz The branch would be https://github.com/Microsoft/vscode-cpptools/pull/3411

[sean-mcmanus]

Should be fixed with 0.23.0-insiders2: https://github.com/Microsoft/vscode-cpptools/releases/tag/0.23.0-insiders2

[larshb]

Version 1.40.2

[sean-mcmanus]

@larshb "high CPU load" is a general symptom with many possible causes -- can you open a new issue with more repro info? Are you able to look at the logs or call stacks to determine what processing is occurring?