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Re:Flecs – A fast entity component system for C and C++ by tbillington on Tuesday April 04, 2023 @02:48AM (#35435991)
The bevy engine (ECS based) has an `UpdateMode` that specifies "Continuous" vs "Reactive" https://docs.rs/bevy/0.10.1/bevy/winit/enum.UpdateMode.html.

Here's an example using it, it's well suited for "desktop applications", the shorthand to use it is `desktop_app()` https://github.com/bevyengine/bevy/blob/1c5c94715cb17cda5ae2....

https://github.com/bevyengine/bevy/

Re:Flecs – A fast entity component system for C and C++ by charcircuit on Tuesday April 04, 2023 @03:26AM (#35436265)
How often your app takes in events != How often your app outputs frames

The OP only mentioned that he wanted to stop outputting frames. Animations, physics, input, etc should still happen normally.