App window lags when dragged around the screen on Windows 10

[Antonio225t]

Hi, I'm using Windows 10 (I have 8GB of RAM and Intel i5) and the latest version of Rust, egui and eframe (I added them 5 minutes ago) and when I'm experiencing an issue that on I couldn't see on the video.

Basically, when I cargo run, the window appears after 20 seconds of loading (I don't know if the wait is normal whenever I make a change on the code), when I drag the window it lags like there is a delay in frames.
You can see what happens in the video, I opened notepad and as you can see when I drag the window, it is smooth. Why does this happen with the rust one??

2024-02-02.20-56-27.mp4

(In the video is hard to see, but the eframe window is not smooth as the notepad one. And since I'm coding in Rust it's... Well odd.)

[YgorSouza]

I tend to add this to my egui projects:

[profile.dev]
opt-level = 1

[profile.test]
opt-level = 0

Because the unoptimized build can be a lot slower than the optimized one. Of course, this will also make the compilation time even longer (which is why I turn off optimization for the tests to save CI minutes), but that's just how it is with Rust. There are a lot of places where egui isn't as fast as it could be, but that's being worked on in the performance issues.

[Antonio225t]

I downloaded the latest versions of egui and eframe and tried again building a hello world GUI application using theese two libraries (of course, with the same PC, didn't change any specs) and sadly the issue is still here...

I would like to thank the contributors that took their time to read my issue and tried to solve this. Really appriciated the effort ❤