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perf(ui): add frame rate throttling to avoid consuming unnecessary CPU resources (#473)

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This adds quite a nice bump to overall UI reactiveness.
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Alexandre Pasmantier 2025-04-20 18:51:27 +02:00 committed by GitHub
parent 2be2ae7cde
commit a938c1c469
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1 changed files with 17 additions and 0 deletions
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17
television/render.rs
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@ -52,6 +52,12 @@ impl UiState {
}
}
/// The maximum frame rate for the UI rendering loop.
///
/// This is used to limit the frame rate of the UI rendering loop to avoid consuming
/// unnecessary CPU resources.
const MAX_FRAME_RATE: u128 = 1000 / 60; // 60 FPS
/// The main UI rendering task loop.
///
/// This function is responsible for rendering the UI based on the rendering tasks it receives from
@ -83,9 +89,11 @@ pub async fn render(
tui.enter()?;
let mut buffer = Vec::with_capacity(256);
let mut frame_start;
// Rendering loop
'rendering: while render_rx.recv_many(&mut buffer, 256).await > 0 {
frame_start = std::time::Instant::now();
// deduplicate events
buffer.sort_unstable();
buffer.dedup();
@ -144,6 +152,15 @@ pub async fn render(
}
}
}
// Sleep to limit the frame rate
let elapsed = frame_start.elapsed();
if elapsed.as_millis() < MAX_FRAME_RATE {
let sleep_duration = std::time::Duration::from_millis(
u64::try_from(MAX_FRAME_RATE - elapsed.as_millis())
.unwrap_or(0),
);
tokio::time::sleep(sleep_duration).await;
}
}
Ok(())