codex - 💡(How to fix) Fix Slow thread switching / loading on Codex macOS desktop app (v26.429.30905, regression) [5 comments, 3 participants]

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openai/codex#20802Fetched 2026-05-03 04:45:13
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What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.429.30905 (2345)

What subscription do you have?

Pro

What platform is your computer?

Darwin 24.5.0 arm64 arm (M4 Pro 24GB RAM)

What issue are you seeing?

After updating to Codex macOS desktop app version 26.429.30905 (2345), switching between threads is noticeably slower. Previously, thread switching was near-instant, but now it consistently takes a few seconds (2-4s) to load each thread.

What steps can reproduce the bug?

  1. Update Codex macOS desktop application to version 26.429.30905 (2345)
  2. Open Codex
  3. Switch between existing threads
  4. Observe delay when loading content

What is the expected behavior?

Thread switching should be near-instant and responsive.

Additional information

  • Regression from previous versions
  • Occurs consistently when switching threads
  • Most noticeable when first opening the app
  • Initial thread load has the biggest delay
  • Performance improves after a thread has been opened once (likely cached), but remains noticeably slower than previous versions

extent analysis

TL;DR

The issue is likely related to a performance regression in version 26.429.30905 (2345) of the Codex App, and a potential workaround could be to clear the app's cache or wait for a future update that addresses the issue.

Guidance

  • The delay in thread switching suggests a potential issue with the app's caching mechanism or resource loading, which may have been introduced in the latest update.
  • To verify the issue, try switching between threads multiple times to see if the performance improves after the initial load, as the problem seems to be most noticeable when first opening the app.
  • Consider reporting the issue to the Codex App support team, as it is a regression from previous versions and consistently occurs when switching threads.
  • If possible, try downgrading to a previous version of the app to see if the issue persists, which could help confirm if the problem is specific to version 26.429.30905 (2345).

Notes

The issue seems to be specific to the macOS desktop app and version 26.429.30905 (2345), and the exact cause of the performance regression is unclear without further information or debugging.

Recommendation

Apply workaround: The best course of action would be to wait for a future update that addresses the performance issue or try clearing the app's cache to see if it improves the thread switching speed, as downgrading the app may not be a viable long-term solution.

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codex - 💡(How to fix) Fix Slow thread switching / loading on Codex macOS desktop app (v26.429.30905, regression) [5 comments, 3 participants]