Cursor hangs/freezes with long chat conversations - performance issue

[boyduang]

Describe the Bug

Cursor becomes unresponsive and hangs when working with long chat conversations. The application fails to load chat data properly in projects with extensive chat history, causing prompts to freeze indefinitely.

Steps to Reproduce

1. Open a Cursor project with long chat history
2. Attempt to interact with the chat interface
3. Try to send a new prompt or load previous messages
4. Observe that the application becomes unresponsive and hangs

Expected Behavior

rsor should load and display chat history smoothly regardless of conversation length, allowing users to continue working without performance issues.

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.1.2 (Universal)
VSCode Version: 1.96.2
Commit: 87ea1604be1f602f173c5fb67582e647fcef6c40
Date: 2025-06-13T00:26:52.696Z (8 hrs ago)
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0

Additional Information

Issue only occurs with projects containing long chat conversations. New projects or those with shorter chat history work normally without hanging problems. This appears to be a performance issue related to chat data loading and rendering.

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, this issue might be related to a large chat history in your project. Cursor isn’t the best place to store chats long-term. If you want to keep your history, you can export it using this extension:

SpecStory - Visual Studio Marketplace

To resolve the issue, try renaming your project or moving it to a different location on your disk. This will break the link to the chat history and should allow you to continue working.