Grimoire creator and prompt engineer Nick Dobos has flagged severe slowdowns and unresponsive UI in OpenAI's Codex desktop app once chat threads stretch across multiple compactions, computer-use actions, or extended sessions, with typing and voice input grinding to a halt; archiving the thread remains the only reliable reset users have identified so far.
@thsottiaux Sometimes I have long threads, ~5-10 compactions, particularly with computer use + goal, that lag like crazy to the point typing and voice mode don’t work anymore. Only way to fix is to archive chat.
Ideally it would not do that
What should we improve in the Codex app. What's not delightful?
Reports note that juggling 10-15 parallel agents or 5-10 compactions pushes renderer memory past 4-5 GB and freezes interactions, while related UI glitches like broken esc+esc scrolling and identical user-AI message colors compound the friction for daily coding workflows.
Neither OpenAI nor the sampled user cluster has surfaced an official patch or timeline, leaving archiving as the standing workaround and prompting some coders to weigh alternatives like the Pi app until performance scales with longer contexts and agent parallelism.
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@thsottiaux Performance
What should we improve in the Codex app. What's not delightful?
@thsottiaux esc+esc scrolling up is buggy
my own messages being the same color as the AI's make it hard to find them
not having an option to show all thinking tokens makes me use pi instead of codex 3 out of 4 times even if it is more expensive, because it is extremely important
What should we improve in the Codex app. What's not delightful?
Running 10-15 agents in parallel starts to slow down the entire system.
Trying to get PRs merged into main and deploy quickly and efficiently seems like a problem Codex can and should solve.
I'm completely limited on how many tokens I can use with Codex for these reasons alone.
What should we improve in the Codex app. What's not delightful?
@thsottiaux Sync & save queue’d messages across iOS and Mac
This is particularly a problem because iOS codex often crashes or freezes when reopening and reconnecting
I’ve lost 20-30 minutes of multiple queued voice recordings because iOS app crashes and reset and clears the queue
What should we improve in the Codex app. What's not delightful?
@MatthewBerman @thsottiaux that as well, like theo said, performace