High CPU Usage with Cursor Python Extension

[emil-peters]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I have very high CPU usage from the node processing being spawned by the Cursor/pyrwight extension.
I just want to have my basic PyLance & Typechecking but with this my PC is unable to do anything.

While the extension is enabled the node process constantly uses 100% cpu usage which spikes my cpu temps.
Simply disabling the extension & reloading cursor stops this and brings everything back to normal.

I would like to use the extension or another to have pylance.

I have already done a extension bisect, and the result of this was that the issue was the Cursor Python extension

Steps to Reproduce

Enable the extension → high cpu usage
Disabled the extsions → throttling is gone & cpu is back to normal

Screenshots / Screen Recordings

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.50
VSCode Version: 1.105.1
Commit: 56f0a83df8e9eb48585fcc4858a9440db4cc7770
Date: 2025-12-06T23:39:52.834Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Linux x64 6.8.0-52-generic

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report. Could you update to version 2.2? We’ve made many improvements in this update and fixed a lot of bugs.

You can download it here: Download · Cursor
Or update via Help > Check for updates

Please check if the issue persists on the new version and let me know. If the bug remains, I’ll pass it to the engineering team right away.

[emil-peters]

Hi Daen,

Thanks for your response. Upgrading to version 2.2 seems to have fixed this issues. I’ll monitor for the next few days to see if any other issues arise.