CPU Spikes when Cursor not in use

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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

tl;dr
CPU spikes when not in use. GitHub Pull Requests was the culprit.

When a folder/repo was loaded, but not in use (no open editors, no background tasks, etc) CPU would spike every few seconds from 5% - 15%.

Following advice from High CPU usage on Windows

I ran Developer: Open Process Explorer

I saw this command showing up intermittedly at ~10% CPU
powershell.exe -c gwmi win32_process -Filter ‘ProcessId=18544’ | select CreationDate,KernelModeTime,ParentProcessId,ProcessId,UserModeTime,WorkingSetSize | format-table

I then ran cursor --disable-extensions

That command didn’t show up, nor did CPU spikes

I then ran Help: Start Extension Bisect which found GitHub Pull Requests – Open VSX Registry.

Disabled, problem went away.

Steps to Reproduce

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.6.26 (user setup)
VSCode Version: 1.99.3
Commit: 6af2d906e8ca91654dd7c4224a73ef17900ad730
Date: 2025-09-16T17:12:31.697Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.19045

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Posted at Extension causes high cpu load · Issue #7778 · microsoft/vscode-pull-request-github · GitHub for those that have the same problem but still want to use the extension.

3

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