Struct FrameHistory 

pub struct FrameHistory { /* private fields */ }

Rolling buffer of recent frame times in milliseconds. Apps push from the main loop; widgets read for display. Sized for ~1 second at 60 fps (matches the egui reference and the prior demo_ui copy).

Implementations

impl FrameHistory

pub const CAP: usize = 60

Number of samples retained. Tuned for a 1-second window at the 60 fps target — short enough to surface a transient hitch on the graph, long enough that a single slow frame doesn’t dominate the “Mean CPU usage” readout.

pub fn new() -> Self

pub fn push(&mut self, frame_ms: f32)

Append frame_ms, dropping the oldest sample once the buffer is full.

pub fn revision(&self) -> u64

Incremented every time a frame sample is appended.

pub fn mean_ms(&self) -> f32

Average of all retained samples (0.0 when empty).

pub fn fps(&self) -> f32

Convenience: 1000 / mean_ms (or 0.0 for an empty / zero buffer).

pub fn len(&self) -> usize

Number of valid samples currently held.

pub fn is_empty(&self) -> bool

pub fn samples(&self) -> impl Iterator<Item = f32> + '_

Iterate samples from oldest to newest (sparkline-friendly order).

Trait Implementations

impl Default for FrameHistory

fn default() -> Self

Returns the “default value” for a type.