CPU usage is too high

Discussion
1

Each cursor instance uses 200% cpu cycles. All the time. Computer literally becomes unusable. I did not have this issue until recently. I love the product but this regression need a fix asap. Please take a look guys. Thanks!

Screenshot 2025-02-09 at 19.18.48
Screenshot 2025-02-09 at 19.18.481626×222 26.7 KB

Macbook Air M1 2020, Sequoia 15.2

Cursor Version: 0.45.11
VSCode Version: 1.96.2
Commit: f5f18731406b73244e0558ee7716d77c8096d150
Date: 2025-02-07T09:43:58.555Z (2 days ago)
Electron: 32.2.6
Chromium: 128.0.6613.186
Node.js: 20.18.1
V8: 12.8.374.38-electron.0
OS: Darwin arm64 24.2.0

2

Same issue on my system. Macbook Pro M2 2023, 32G

3
4

I do need to use the extensions otherwise it’s not a useful solution.

Could you suggest the next steps to identify the extension causing trouble with Cursor?

5

You can try identifying the extension causing problems by opening the Process Explorer in Cursor.

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6

Hi deanrie, see the screenshot below.

I did some testing and I can confirm that not a specific extension is using CPU but instead the parent process extensionHost process consuming 200% consistently. This indicates the issue is on Cursor. For reference I tried using Visual Studio Code and did not bump into this problem.

I suggest escalating this to the tech team to investigate please. My battery which is supposed to last 10+ hours with light coding, is now being exhausted within 2 hours and computer is always heated up while cursor is running.

Screenshot 2025-02-17 at 15.11.18
Screenshot 2025-02-17 at 15.11.183010×1302 489 KB

7

I don’t have this problem, so I believe the issue is on your side. Try starting in safe mode: cursor --disable-extensions.

8

I started having the same issue after the last update, I could barely use my computer. I “fixed it” by removing an “import cost” plugin I had. I’ve been using that plugin for years without an issue, so it’s definitely something related to cursor.

1 Like
9

Just tested this now, after I disable this extension CPU usage is down to normal. @deanrie, can you investigate this incompatibility? It’s an extension most people would have.

10

Try this alternative extension, it performs the same function.

11

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Same with me as well.

12

Same issue here. Constantly using ca 20% cpu. It stops if I use the disable-extensions parameter. If I manually stop all extensions it doesn’t stop.