Switching desktops causes a spike in usage

[rendaoer]

Bevy version

v0.10.0

[Optional] Relevant system information

If you cannot get Bevy to build or run on your machine, please include:

• the Rust version you're using (you can get this by running cargo --version)
  cargo 1.67.1 (8ecd4f20a 2023-01-10)
• the operating system or browser used, including its version
  macOS Ventura 13.2.1

If your bug is rendering-related, copy the adapter info that appears when you run Bevy.

SystemInfo { os: "MacOS 13.2.1 ", kernel: "22.3.0", cpu: "Apple M1", core_count: "8", memory: "8.0 GiB" }

What you did

On macOS, I'm used to using multiple desktops for windows [main desktop, browser, VS Code], and when I run a bevy program, a window is created on the main desktop, which is all fine at that point. By the time I switch to another desktop, the footprint of this bevy program goes up a lot, causing my computer to start heating up. This problem has nothing to do with my code, it just needs to be run and it will do that.

Additional information

Other information that can be used to further reproduce or isolate the problem.
This commonly includes:

• screenshots
  Normal:

Switch desktop for a while and then come back:

[rendaoer]

Switching desktops means this:

[alice-i-cecile]

I bet that this is no longer being framerate throttled by vsync. Can you check how fast your main loop runs while your desktop is swapped? And try playing with https://docs.rs/bevy/latest/bevy/window/enum.PresentMode.html

[rendaoer]

I bet that this is no longer being framerate throttled by vsync. Can you check how fast your main loop runs while your desktop is swapped? And try playing with https://docs.rs/bevy/latest/bevy/window/enum.PresentMode.html

print.log
Exactly as you would expect, the frame rate stays at 60 or below when on the main desktop, whether in foreground or background, but once you switch desktops, the frame rate slowly rises to 1200fps

[rendaoer]

I bet that this is no longer being framerate throttled by vsync. Can you check how fast your main loop runs while your desktop is swapped? And try playing with https://docs.rs/bevy/latest/bevy/window/enum.PresentMode.html

No matter which PresentMode I use, the effect is the same, and Vsync fails when switching desktops

[alice-i-cecile]

Well, that's very helpful to know. What happens if you use bevy_framepace to limit the frame rate?

[rendaoer]

Well, that's very helpful to know. What happens if you use bevy_framepace to limit the frame rate?

bevy_framepace is effective in terms of limiting the frame rate, but it feels like it causes significant frame rate fluctuations and doesn't support bevy@0.10

[mockersf]

this is the same as #5856