# Cursor Performance issue long Buffering Moment

**URL:** <https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211>\
**Category:** Bug Reports\
**Tags:** macos, performance\
**Created:** [January 28, 2026, 7:43pm UTC](https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211 "2026-01-28T19:43:14Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![QuackDB](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/quackdb/32/96316_2.png) [@QuackDB](https://forum.cursor.com/u/QuackDB)\
**Post date:** [January 28, 2026, 7:43pm UTC](https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211/1 "2026-01-28T19:43:14Z")

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### Where does the bug appear (feature/product)?

Cursor IDE

### Describe the Bug

This issue occurs in Cursor IDE every time I open the app. It opens and then buffers for a long time, freezing the application with the spinning wheel of death. After it finishes buffering, the application itself runs sluggishly. This is happening on a Mac Pro with an M4 chip.

### Steps to Reproduce

not sure now to reproduce it since it just happens on open.

### Operating System

MacOS

### Version Information

Version: 2.5.0-pre.16.patch.0 (Universal)  
VSCode Version: 1.105.1  
Commit: 69b4cdc839326103e4520aac002f7e77937b77a0  
Date: 2026-01-28T10:08:10.132Z (9 hrs ago)  
Build Type: Stable  
Release Track: Nightly  
Electron: 39.2.7  
Chromium: 142.0.7444.235  
Node.js: 22.21.1  
V8: 14.2.231.21-electron.0  
OS: Darwin arm64 25.3.0

### Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

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**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\
**Post date:** [January 29, 2026, 7:25am UTC](https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211/3 "2026-01-29T07:25:26Z")

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Hey, thanks for the report. This issue is related to the Nightly build (2.5.0-pre.16). Nightly builds can have regressions that aren’t in the stable version.

Let’s try to diagnose it:

**1. Check extensions** (they often cause startup freezes):

- VS Code settings: Application \> Experimental \> Extension Monitor
- `Cmd + Shift + P` \> Developer: Open Extension Monitor
- See what’s using CPU during startup
- Or try running `cursor --disable-extensions` in Terminal. If it runs fast, extensions are the cause

**2. Switch to the stable version:**

- Cursor Settings \> Beta \> Switch to Stable
- Nightly builds are unstable by design

**3. If it still happens** , please share:

- `Cmd + Shift + P` \> Developer: Open Process Explorer (a screenshot while it’s slow)
- Activity Monitor: CPU and RAM usage for Cursor processes
- Workspace size (number of files and folders)

It might be related to indexing a large project or some git operations on startup. Let me know how it goes on the stable version.

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**Author:** ![QuackDB](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/quackdb/32/96316_2.png) [@QuackDB](https://forum.cursor.com/u/QuackDB)\
**Post date:** [January 30, 2026, 4:34pm UTC](https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211/4 "2026-01-30T16:34:35Z")

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Hi Dean,

I’ll give it a try this weekend and see if that works and if not I’ll try to get more data for you on what might be happening. Thank you for the suggestion ✌🏻🫶🏼.

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**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\
**Post date:** [February 21, 2026, 4:35pm UTC](https://forum.cursor.com/t/cursor-performance-issue-long-buffering-moment/150211/5 "2026-02-21T16:35:27Z")

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