Struct PrepareBreakdown 

pub struct PrepareBreakdown {
    pub plugin_ms: f32,
    pub lighting_ms: f32,
    pub uniforms_ms: f32,
    pub instancing_ms: f32,
    pub geometry_ms: f32,
    pub shadow_ms: f32,
    pub viewport_ms: f32,
    pub other_ms: f32,
}

CPU time spent in each phase of prepare(), in milliseconds.

FrameStats::cpu_prepare_ms is the total. This splits that total across the main phases so a slow prepare can be attributed to a specific one instead of guessing. The fields sum to roughly cpu_prepare_ms; other_ms carries the remainder (timestamp readback, scatter-volume sort, stats assembly, and other small per-frame work).

All values are wall-clock CPU time on the thread calling prepare, measured with Instant. They measure how long it takes to record and submit the work, not how long the GPU spends running it; use gpu_frame_ms for GPU cost.

Fields

plugin_ms: f32

Item-type plugin prepare and cull dispatch. Skinning and other vertex deformers run here, so a heavy skinned crowd shows up in this field.

lighting_ms: f32

Lighting setup: directional shadow cascade matrices, point-light cube-map faces, and light clustering.

uniforms_ms: f32

Per-object uniform writes on the non-instanced path. Zero when the scene is above the instancing threshold and all meshes batch.

instancing_ms: f32

Building and uploading instanced batches (grouping items by mesh and material, writing instance data).

geometry_ms: f32

Uploading non-mesh geometry: glyphs, point clouds, polylines, decals, images, tubes, ribbons, slices, and volumes.

shadow_ms: f32

Recording the shadow depth pass (directional cascades and point-light cube-map faces) into the atlas.

viewport_ms: f32

Per-viewport prepare: camera and clip uniforms, grid, overlays, and interaction state. Runs once per viewport.

other_ms: f32

Remainder of prepare not covered by the fields above.

Trait Implementations

impl Clone for PrepareBreakdown

fn clone(&self) -> PrepareBreakdown

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PrepareBreakdown

impl Debug for PrepareBreakdown

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

Formats the value using the given formatter.

impl Default for PrepareBreakdown

fn default() -> PrepareBreakdown

Returns the “default value” for a type.