codex app on pc from last update is slow and werry laggy on high end pc

Open 💬 4 comments Opened Aug 14, 2026 by matule123

💡 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)?

26.812.11052

What subscription do you have?

plus plan

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

hello today i install new lattest update and the whole pc app started to get laggy the cursor moves with a jerky motion everithing is low opening settings writing prompt and it feels slow. I have good pc that can handle it but this last update broke the whole app only the app is laging.

What steps can reproduce the bug?

fixing some bug in last update or optimize it

What is the expected behavior?

smooth app

Additional information

_No response_

View original on GitHub ↗

4 Comments

github-actions[bot] contributor · 13 days ago

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

#38559
#38554
#38556
#38546
#38506

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zemeng5208 · 13 days ago

This may be worth comparing with the newer Windows reports where the slowdown is not GPU-bound but comes from repeated Chrome/plugin runtime reconciliation in the Electron main process.

I maintain WinBridge Recovery for Windows Codex Desktop local-state failures. If you can reproduce the lag again, one useful distinction is whether the desktop log is repeatedly emitting messages such as chrome_native_host_cache_reconcile_failed, bundled_executable_relocation_failed, or other Chrome/runtime sync errors. WinBridge can check whether the installed AppX package, user-side bundled marketplace/plugin cache, latest, Native Host and local runtime are actually consistent.

If those local layers are healthy and CPU is still high, I would not expect a local repair tool to solve it — that points back to the current Desktop build's reconciliation/UI loop. But if the app is repeatedly retrying because a user-side runtime/cache is stale or incomplete, that is the class WinBridge is intended to diagnose and recover without modifying WindowsApps.

Loryium · 13 days ago

I can reproduce the same system-wide mouse stutter on another Windows 11 system. I found a reliable workaround that may help narrow down the cause.

Environment

Codex version shown in About: 26.810.41047
Installed MSIX package: 26.810.4967.0
Windows 11 25H2, build 26200.8457
Display: 1920 × 1080 at 360 Hz
Hybrid graphics: NVIDIA RTX 3070 Ti Laptop GPU + AMD integrated graphics

Reliable workaround

With the floating Pet active, mouse movement stuttered system-wide.
Setting Task Manager to Always on top made the cursor smooth immediately.
Using Settings > Pets > Tuck Away Pet also eliminated the stutter immediately, without restarting Codex or changing graphics settings.

CPU usage remained broadly similar after hiding the Pet, while mouse movement became smooth. This suggests the improvement may be related to the Pet/overlay window or Windows composition path rather than CPU usage alone.

<details>
<summary>Additional diagnostic information</summary>

The Codex desktop logs contained a renderer identified as:

rendererWindowAppearance=avatarOverlay
rendererWindowFocused=false
rendererWindowVisible=false

It continued receiving task/reasoning events and repeatedly logged:

Received turn/started for unknown conversation
Received turn/completed for unknown conversation

I also found:

DPC usage peaked at approximately 0.97%
Interrupt usage peaked at approximately 1.55%
No display-driver reset, GPU timeout, DWM crash, or application-hang event in the previous 24 hours

</details>

I have not re-enabled the Pet yet, so I have confirmed the workaround but have not tested a second reproduction after re-enabling it. This may be one trigger within the broader issue rather than the only root cause.

Mailootje · 9 days ago

Same issue over here, and some prompts are taking 5 hours + to finish!

CPU: i9-14900K
MEM: 64GB 6000MHZ
SSD: 4TB NVME 4.0
GPU: RTX 5090