Struct FrameTiming 

pub struct FrameTiming {

    pub frame: u64,
    pub t_us: u64,
    pub sync_us: u64,
    pub build_layout_us: u64,
    pub apply_layout_us: u64,
    pub draw_us: u64,
    pub draw_commands: u64,
    pub handle_event_us: u64,
    pub resource_availability_us: u64,
    pub scene_pool_wait_us: u64,
    pub presence_overlay_us: u64,
    pub input_events: u64,
    pub input_event_max_us: u64,
    pub input_dispatch_us: u64,
    pub input_hit_test_us: u64,
    pub input_resources_us: u64,
    pub input_publication_us: u64,
    pub input_commit_us: u64,
    pub input_to_commit_us: u64,
    pub total_us: u64,
}

This is the atom every surface shares: the HUD graphs it, the dump serialises it, and PerfReport aggregates it.

Fields

frame: u64

t_us: u64

A monotonic counter, not a wall clock, so it is immune to clock steps.

sync_us: u64

build_layout_us: u64

apply_layout_us: u64

draw_us: u64

draw_commands: u64

The draw commands the frame’s drawn scene encoded: the drawing it composed, whether a frame reuses what it kept or draws it again.

handle_event_us: u64

resource_availability_us: u64

scene_pool_wait_us: u64

presence_overlay_us: u64

input_events: u64

Input events whose handle_event time is folded into this frame. Several events share a frame, so handle_event_us is their sum, not any one event’s cost.

input_event_max_us: u64

The costliest single event among input_events.

input_dispatch_us: u64

InputPhases::dispatch, summed over input_events.

input_hit_test_us: u64

InputPhases::hit_test, summed over input_events.

input_resources_us: u64

InputPhases::resources, summed over input_events.

input_publication_us: u64

InputPhases::publication, summed over input_events.

input_commit_us: u64

InputPhases::commit, summed over input_events.

input_to_commit_us: u64

From the start of the oldest of input_events to this frame’s commit: how long the first input waited for a CPU frame showing it. Ends before the render worker, so it is not input-to-photon latency.

total_us: u64

For the live app this is the measured wall time of the whole frame build (so it includes work between passes); for the headless harness, where passes run contiguously, it is their sum.

Implementations

impl FrameTiming

pub fn over_budget(&self) -> bool

Trait Implementations

impl Clone for FrameTiming

fn clone(&self) -> FrameTiming

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FrameTiming

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

Formats the value using the given formatter.

impl Default for FrameTiming

fn default() -> FrameTiming

Returns the “default value” for a type.

impl Serialize for FrameTiming

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for FrameTiming