High CPU when Robot Framework Language is loaded in Pycharm

[cookindutch]

When I installed the Robot Framework Language in Pycharm the CPU usage went from 3% to 25% - 36% continuously. This also causes my fans to run all the time.

To Reproduce
Steps to reproduce the behavior:

1. Install Robot Framework Language
2. Restart PyCharm and wait.

Expected behavior
No significant change in processor activity should happen when sitting idle.

Screenshots

Versions:

• OS: Windows 10
• Robot Framework Language Server Version 0.16.0
• PyCharm 2021.1.1

[fabioz]

Can you expand to show the contents of the process below PyCharm in the task manager?

-- I'm curious to know which process is taking up the CPU usage in your use-case.

Something as:

[cookindutch]

[fabioz]

Is it possible for you to attach a profiler and send me the related pstats files from that?

To do that, please do the following:

1. Install PyVmMonitor (download it at: https://www.pyvmmonitor.com/download.html) -- you can use the 15 days trial.
2. Attach it to the process which has the high CPU usage (following the steps from: https://www.pyvmmonitor.com/attach_to.html). Note: you can right-click the tabs in the process explorer and select PID so that you know which PID should be profiled.
3. Save the pstats and attach them to this issue.
   i.e.:
   

[cafe88]

I hope i've done this right. If not, please let me know ;-)

This is the log from one of the four Python processes which lead to high cpu load

test.zip

[fabioz]

Thanks for the logs... apparently the filesystem polling is responsible for that.

I guess the filesystem polling is too tied to work well on my system. Also, apparently there's polling from several processes at once.

I'm working on fixing this (both with a better polling algorithm -- or using native filesystem notifications when possible -- to work better on other machines and to make the polling work on a single process and have other processes talk to it instead of having polling in multiple processes).

[cafe88]

Thank you for the quick reply!
Maybe I have another useful information for you:

I've set up a test robot-file with only one Test case with only one Log in it (especially without using additional Libraries) and that does not seem to be a problem, no high CPU load.
If i can help you with any other information, please feel free to tell me what you need.

[fabioz]

Yeap, the filesystem polling speed is pretty much related to the number of files you have under the workspace, so, on tiny projects it shouldn't be a problem.

[fabioz]

This should be fixed in version 0.17.0 (which I hope to release next week).

[cafe88]

Seems to be working fine, thank you very much for your quick reaction!

[cookindutch]

This has fixed the problem I was having. Thanks!

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