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codex - 💡(How to fix) Fix High CPU load in vscode codex extension in recent versions on linux [2 comments, 2 participants]

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openai/codex#17730•Fetched 2026-04-14 05:41:03
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What version of the IDE extension are you using?

26.5406.31014

What subscription do you have?

enterprise user

Which IDE are you using?

vscode

What platform is your computer?

Linux 6.8.0-107-generic x86_64 x86_64

What issue are you seeing?

Continuously high CPU load on codex vscode extension in recent versions.

Starts when the extension is loaded and happens continuously.

It happens without any interaction.

CPU load dropped when codex extension disabled.

The load appears to be back to normal after reverting to a prior revision:

26.5406.40811 -- high cpu

26.5406.31014 -- high cpu

26.5401.11717 -- ok

What steps can reproduce the bug?

Install the problematic versions of the codex extension in vscode. Ensure the extension is running and interactive. Observe continuous high cpu load.

What is the expected behavior?

The extension has low or unnoticeable CPU load.

Additional information

Normal load:

<img width="1890" height="140" alt="Image" src="https://github.com/user-attachments/assets/dfbbf493-5554-4ebc-bd2a-4860539679c5" />

High load:

<img width="1890" height="140" alt="Image" src="https://github.com/user-attachments/assets/3267ac2a-807e-4b0d-b78c-b04d5f9e5e25" />

extent analysis

TL;DR

Reverting to version 26.5401.11717 of the codex extension may resolve the high CPU load issue in vscode.

Guidance

  • The high CPU load issue appears to be specific to versions 26.5406.31014 and 26.5406.40811 of the codex extension, so trying an earlier version may help.
  • To verify the issue, install the problematic version of the extension, ensure it's running, and observe CPU load; then, revert to version 26.5401.11717 and check if the load returns to normal.
  • If reverting to an earlier version is not feasible, consider reporting the issue to the extension developers with detailed system and version information.
  • Monitoring system resources and extension activity may help identify patterns or triggers for the high CPU load.

Notes

The provided information suggests a version-specific issue, but without more details on the extension's functionality or system configuration, it's difficult to pinpoint the exact cause.

Recommendation

Apply workaround: Revert to version 26.5401.11717 of the codex extension, as it has been reported to have normal CPU load.

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