Insane gpu usage when hovering over the UI.

[FaisalAhmedAlghamdi]

Is there an existing issue for this?

• I have searched the existing issues.

Is this issue related to iced?

• My hardware is compatible and my graphics drivers are up-to-date.

What happened?

As you can see when running the todo demo in debug or release and then i hover my mouse over the gui i get insane gpu usage for no reason.

What is the expected behavior?

Minimal GPU usage, this isn't an issue in desktop machines but its a huge problem for laptops since the battery will get drained quickly.

Version

crates.io release

Operating System

Windows

Do you have any log output?

No response

[anantnrg]

Instead of saying:

crates.io release

please specify the exact number, like 0.10.0 or if you built it from scratch, the commit hash, like 3ec5ad4.

[b4too]

I get the same behavior from a build --release version of the tour example on an ubuntu-based distro with latest stable available nvidia driver(525.147.05), latest stable rust toolchain(1.73.0), and iced version 0.10.0.
Using nvidia-smi I see an increase in GPU usage from 0-1% when the mouse is outside the window to 30% when hovering over buttons, and ~20% when hovering over simple window. To compare, I only go to 5% while hovering over the nemo file explorer buttons.

Perhaps making an available API to reduce the calls frequency to user inputs (hover, click, ...) or something like that ? I only discovered the iced ecosystem and started playing with it, I like it a lot, but since my knowledge is limited I might not know of such an API if it already exists.

[mochalins]

I'm not certain if this is related, but using the latest proprietary Nvidia driver (545.29.06-2) on Fedora 39 Wayland, with iced master branch (commit 90332ac), simply hovering the cursor over any of the examples causes the example to immediately hang. This behavior extends to multiple third party Iced applications that I could download and test from #355, and also to Iced 0.10.0. This is all on latest stable Rust toolchain (1.75.0).

Edit: This behavior was resolved on my system by forcing winit to use X11.

[salimp2009]

Hi ,
I tried examples todos, tour both on master branch (commit 416e002) today and also made the same examples using iced version 0.10 and I am using Nvidia prop drivers 545.29-6.1 on Arch, Wayland, using Hyprland .

the GUI opens but I can not input any text or click buttons and not even close the GUI unless I do Ctrl-C from the terminal. GUI looks like it is frozen

I saved the output when I run cargo run --package todos into text file in case if it helps to debug
todo_run_output.txt

[ids1024]

The issue with freezing on Nvidia + Wayland should be fixed by gfx-rs/wgpu#4967. Though that doesn't seem to have been included in the wgpu latest release.

[salimp2009]

The issue with freezing on Nvidia + Wayland should be fixed by gfx-rs/wgpu#4967. Though that doesn't seem to have been included in the wgpu latest release.

When do you think we should expect it to be included in your create ?

[ids1024]

That's a change to wgpu rather than iced, so you'd have to ask the wgpu maintainers. Unless Iced switches to a patched version of wgpu.

You should be able to override the version of wgpu used by any of your program's dependencies by adding something like this to Cargo.toml:

[patch.crates-io]
wgpu = { git = "https://github.com/gfx-rs/wgpu", rev = "ac8756c" }

[salimp2009]

That's a change to wgpu rather than iced, so you'd have to ask the wgpu maintainers. Unless Iced switches to a patched version of wgpu.

You should be able to override the version of wgpu used by any of your program's dependencies by adding something like this to Cargo.toml:

[patch.crates-io]
wgpu = { git = "https://github.com/gfx-rs/wgpu", rev = "ac8756c" }

I started learning iced. so dont have directly dependency to wgpu but maybe make a local branch of iced and change the wgpu dependency like that until it is resolved.
Right now I did a workaround by setting WGPU_BACKEND=GL in my environment settings wayland/hyprland and then it works but uses OpenGL backend

[Friz64]

This is [patch.crates-io], which is not necessarily about direct dependencies of your crate. It essentially replaces every wgpu dependency that exists in the dependency graph with the specified git version. Try adding those two lines to the end of your Cargo.toml.

[salimp2009]

wgpu = { git = "https://github.com/gfx-rs/wgpu", rev = "ac8756c" }

Shall I put that first and then iced in my example crate, will that work ?
i did put iced in the example crate & the patch you gave but it did not work
When you said put it on Cargo.toml , is that the example crate Cargo.toml or is that a global Cargo.toml ?

[Friz64]

diff --git a/Cargo.toml b/Cargo.toml
index c9dee6b7..5a3ad548 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -162,3 +162,6 @@ wgpu = "0.19"
 winapi = "0.3"
 window_clipboard = "0.4"
 winit = { git = "https://github.com/iced-rs/winit.git", rev = "b91e39ece2c0d378c3b80da7f3ab50e17bb798a5" }
+
+[patch.crates-io]
+wgpu = { git = "https://github.com/gfx-rs/wgpu", rev = "ac8756c" }

Just tried it myself on iced master. I got a warning from Cargo that told me to run cargo update, after which it worked.

[salimp2009]

I have this

[package]
name = "counter_iced"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
iced = "*"

[patch.crates-io]
wgpu = { git = "https://github.com/gfx-rs/wgpu", rev = "ac8756c" }

cargo gives me this warning, and when I run cargo update , it gives it again

warning: Patch `wgpu v0.19.0 (https://github.com/gfx-rs/wgpu?rev=ac8756c#ac8756c2)` was not used in the crate graph.
Check that the patched package version and available features are compatible
with the dependency requirements. If the patch has a different version from
what is locked in the Cargo.lock file, run `cargo update` to use the new
version. This may also occur with an optional dependency that is not enabled.

[Friz64]

Oh. Yes. You're depending on the crates.io version of iced, which is too old for that new wgpu patch. You would need to depend on the git version of iced, by setting

[dependencies]
iced = { git = "https://github.com/iced-rs/iced.git", rev = "a1114ca" }

[salimp2009]

[dependencies]
iced = { git = "https://github.com/iced-rs/iced.git", rev = "a1114ca" }

UPDATE : thank you it worked awesome :)
and I just learned how to apply a patch on the fly. just another reason to love Rust & community
i will try . thanks

[salimp2009]

after applying wgpu patch as above, also the performace looks good too.
running the counter example with debug on Wayland,