# \[Bug\]: Windows desktop typing lags even in empty chats; browser interface is smooth · Issue \#12689 · pingdotgg/t3code

[View on GitCafe](https://git.cafe/pingdotgg/t3code/issues/12689)

Repository: [pingdotgg/t3code](https://git.cafe/pingdotgg/t3code)

Visibility: public

State: backlog

Priority: 0

## Description

[Discussion and activity](https://git.cafe/pingdotgg/t3code/issues/12689)

---

### Before submitting

- [x] I searched existing issues and did not find a duplicate.
- [x] I included enough detail to reproduce or investigate the problem.

### Area

apps/desktop

### Steps to reproduce

1. Open T3 Code Desktop on Windows.
2. Start a new, empty chat.
3. Type continuously in the composer and observe input lag.
4. Keep the same local backend running and open http://localhost:3773 in a browser.
5. Type in the browser interface. Typing is smooth there.

This reproduces on my installation; I have not tested with a fresh application profile.

### Expected behavior

Typing in the desktop composer should appear immediately, with responsiveness comparable to the browser interface.

### Actual behavior

Typing in the desktop application visibly lags, including in new, empty chats. The browser interface connected to the same backend does not lag.

The desktop also displays “Some requests are slow” messages, although I have not established whether those warnings share the same cause.

### Impact

Blocks work completely

### Version or commit

0.0.42

### Environment

Windows 11 Pro, build 26200, T3 Code Desktop (Alpha) 0.0.42, Intel Core i7-12700H, 20 logical processors 64 GB RAM Intel Iris Xe / NVIDIA GeForce RTX 3070 Ti Laptop GPU Local backend; browser interface on the same machine is responsive

### Logs or stack traces

```shell
Renderer CPU profile captured while typing:

Recording duration: 18.3 seconds
Renderer idle time: approximately 15.9 seconds (87%)
One continuous approximately 1,000 ms interval in:

getLocalEnvironmentBootstraps
  -> ipcRenderer.sendSync
  -> native sendSync

Installed preload implementation:
electron.ipcRenderer.sendSync(GET_LOCAL_ENVIRONMENT_BOOTSTRAPS_CHANNEL)

The installed frontend polls environment topology every 3 seconds.
Desktop traces during the capture show bootstrap handler execution
around 0.06–0.18 ms.

This suggests a synchronous desktop IPC stall. The source of the one-second wait is not established, and the profile alone does not prove that this accounts for all perceived input lag.
```

### Screenshots, recordings, or supporting files

[cpu-profile.zip](https://github.com/user-attachments/files/32430646/cpu-profile.zip)

### Workaround

Use the browser interface at http://localhost:3773 while the local backend remains running. Typing is smooth there. No application settings or binaries were changed.