CPU taking more than 50% all time.

Resolved 💬 3 comments Opened Dec 21, 2025 by angelcervera Closed Jan 6, 2026

💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What version of Codex is running?

codex-cli 0.76.0

What subscription do you have?

Pro

Which model were you using?

gtp-5.2-codex

What platform is your computer?

Linux 6.17.0-8-generic x86_64 / Ubuntu 25.10

What issue are you seeing?

Just opening codex, it is taking more than 50% of CPU

What steps can reproduce the bug?

Uploaded thread: 019b3f6a-2281-7fd1-bf03-25e344ea24bc

Open codex -> stay consuming around 50% CPU

What is the expected behavior?

When it is not thinking, it should take no resources.

Additional information

Just open:
4000587 angelcc 20 0 1392.5g 644184 146264 R 43.2 1.0 2:31.63 chrome

Stay there or increase.

View original on GitHub ↗

3 Comments

github-actions[bot] contributor · 8 months ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

#8176

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etraut-openai contributor · 8 months ago

Thanks for the bug report.

I have a theory about what's causing the problem you're seeing, but I could use your help to validate. Could you please disable the undo feature to see if that fixes the problem? Add the following to your config.toml file.

[features]
undo = false

etraut-openai contributor · 7 months ago

Closing due to lack of response.