Struct FrameStats 

pub struct FrameStats { /* private fields */ }

Rolling frame-time statistics sampled once per rendered frame.

Implementations

impl FrameStats

pub fn new() -> Self

Creates empty stats (no samples yet).

pub fn record(&mut self)

Samples the current time as one rendered frame.

pub fn record_at(&mut self, now: Instant)

Samples now as one rendered frame.

Takes the timestamp explicitly so tests can inject exact intervals and hosts can forward a timestamp they already hold.

pub fn samples(&self) -> usize

Number of samples currently in the window.

pub fn fps(&self) -> Option<f32>

Rolling frames-per-second over the window, or None with < 2 samples.

pub fn avg_ms(&self) -> Option<f32>

Mean frame interval in milliseconds, or None with < 2 samples.

pub fn worst_ms(&self) -> Option<f32>

Worst single frame interval in the window in milliseconds.

Useful for selection-jank testing: FPS can look fine on average while individual frames blow the 16.6ms budget.

pub fn clear(&mut self)

Drops all samples (e.g. when opening a new document to test).

pub fn text(&self) -> String

Compact one-line summary ("60 fps · 16.6 ms avg · 18.1 ms worst"), or "fps: …" before enough samples exist.

Trait Implementations

impl Clone for FrameStats

fn clone(&self) -> FrameStats

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FrameStats

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FrameStats

fn default() -> FrameStats

Returns the “default value” for a type.