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VSCode Codex keeps 200% CPU and high power assumption on chat conversation page #16108
Description
What version of the IDE extension are you using?
26.325.31654
What subscription do you have?
ChatGPT Business
Which IDE are you using?
VS Code
What platform is your computer?
Darwin 25.4.0 arm64 arm
What issue are you seeing?
When I open the Codex plugin from the sidebar in VS Code and enter the chat page, even if I do nothing and stay completely idle, I see CPU usage instantly spike above 200%, and my power draw stays above 25W. As soon as I exit the chat screen and return to the chat list, CPU usage immediately returns to normal, and power consumption drops to around 5W (the normal idle power for a Mac).
What steps can reproduce the bug?
Open VSCode, open the codex in the chat sidebar, select a conversation (some specific conversations will trigger this phenomenon, but as long as I completely exit the vs code, they are likely to solve it, and they will appear again after a period of time), observe the activity monitor and my wall plug with a display.
What is the expected behavior?
No response
Additional information
Activity
[-]Codex maintains 200% CPU and high power assumption in conversation page[/-][+]VSCode Codex keeps 200% CPU and high power assumption on conversation page[/+][-]VSCode Codex keeps 200% CPU and high power assumption on conversation page[/-][+]VSCode Codex keeps 200% CPU and high power assumption on chat conversation page[/+]github-actions commentedon Mar 28, 2026
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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etraut-openai commentedon Mar 28, 2026
I think this is a duplicate of #15503.
msg7086 commentedon Mar 30, 2026
Today I got pushed 31654 on my work laptop (Windows 11) and it stops responding after I open the app. I don't know which version was last known good version, but it was working well last Thursday.