Agent window makes my pc on fire 🔥

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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Recently I was trying to use agent window but it seems to not be optimized.
Using Agent Window my pc temperature reached 85 degrees. After I turned it off, my pc temperature decreased to 65 degress.

I think there is something wrong with it, 20 ºC is too much difference.

:fire::fire::fire::fire::fire::fire:

Steps to Reproduce

Use Agent Window

Expected Behavior

Should work without increasing the pc temperature too much

Operating System

Windows 10/11

Version Information

Version: 3.5.33 (user setup)
VSCode Version: 1.105.1
Commit: aac81804b986d739acab348ed96b8bea6e83cc50
Date: 2026-05-22T06:47:48.039Z
Layout: editor
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26200

Does this stop you from using Cursor

No - Cursor works, but with this issue

5

Hey, thanks for the report. High CPU usage in the Agent Window (Glass) is on our radar. It’s part of a cluster of known performance bugs in this mode. I can’t share an ETA for a fix yet.

To help with debugging, could you please send:

  • A Task Manager screenshot while the CPU is high, which Cursor process is using CPU (main, extensionHost, renderer)
  • How many agents you have running at the same time, and how large the workspace is
  • Whether it also happens in an empty project with no active agents

Related thread for context: Laggy typing in agents window. I’ll post an update here once I have one.