performance issues
Open 💬 1 comment Opened Aug 17, 2026 by owlyeagle
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of the Codex App are you using (From “About Codex” dialog)?
26.810.7004.0.
What subscription do you have?
pro 20x
What platform is your computer?
_No response_
What issue are you seeing?
Opening a large thread spawns a sustained multi-core CPU burst — peak 7.3 cores over ~27 seconds on a 24-core 14900K — with GPU utilisation under 20% throughout. Some renderer processes run at AboveNormal priority. On high-refresh displays this starves the compositor and produces system-wide cursor stutter. Cost scales with transcript size; this corpus has 13 threads over 5 GiB, largest 12.10 GiB. Version 26.810.7004.0.
What steps can reproduce the bug?
optimizations
What is the expected behavior?
_No response_
Additional information
_No response_
1 Comment
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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