CPU usage and Operational lag is very high，

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

During the use of the cursor, there are occasional malfunctions. The CPU usage is very high. Every once in a while, the cursor will become stuck. Other software functions normally, but only the cursor gets stuck.

Steps to Reproduce

Normal use, This will happen again after a while.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.52
commit: 1.99.3

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey thanks for the report

High CPU usage and lag in Cursor are often caused by extensions or separate processes. To find the cause, please do the following:

Check Extension Monitor:

  • Settings > Application > Experimental > enable “Extension Monitor”
  • Ctrl+Shift+P → “Developer: Open Extension Monitor”
  • Take a screenshot when the lag occurs

Check Process Explorer:

  • Ctrl+Shift+P → “Developer: Open Process Explorer”
  • Take a screenshot showing which processes are using CPU (especially extensionHost or ptyHost)

Test without extensions:

  • Run: cursor --disable-extensions
  • Does the lag persist?

Also share:

  • What you were doing when the lag happened (typing, AI features, opening files)
  • Errors in the console: Help > Toggle Developer Tools > Console tab

This info will help us find the root cause!