Struct RendererTextPerfSnapshot 

pub struct RendererTextPerfSnapshot {

    pub frame_id: FrameId,
    pub font_stack_key: u64,
    pub font_db_revision: u64,
    pub fallback_policy_key: u64,
    pub frame_missing_glyphs: u64,
    pub frame_texts_with_missing_glyphs: u64,
    pub blobs_live: u64,
    pub blob_cache_entries: u64,
    pub shape_cache_entries: u64,
    pub measure_cache_buckets: u64,
    pub shape_cache_bytes_estimate_total: u64,
    pub blob_paint_palette_bytes_estimate_total: u64,
    pub blob_decorations_bytes_estimate_total: u64,
    pub unwrapped_layout_cache_entries: u64,
    pub frame_unwrapped_layout_cache_hits: u64,
    pub frame_unwrapped_layout_cache_misses: u64,
    pub frame_unwrapped_layouts_created: u64,
    pub frame_cache_resets: u64,
    pub frame_blob_cache_hits: u64,
    pub frame_blob_cache_misses: u64,
    pub frame_blobs_created: u64,
    pub frame_shape_cache_hits: u64,
    pub frame_shape_cache_misses: u64,
    pub frame_shapes_created: u64,
    pub mask_atlas: RendererGlyphAtlasPerfSnapshot,
    pub color_atlas: RendererGlyphAtlasPerfSnapshot,
    pub subpixel_atlas: RendererGlyphAtlasPerfSnapshot,
    pub registered_font_blobs_count: u64,
    pub registered_font_blobs_total_bytes: u64,
    pub family_id_cache_entries: u64,
    pub baseline_metrics_cache_entries: u64,
}

Per-frame renderer-owned text cache counters.

This is intended for diagnostics bundles and on-screen debug panels. The runner can update it once per rendered frame to make renderer-level churn (text blobs, glyph atlas pressure) visible in a single artifact.

Fields

frame_id: FrameId

font_stack_key: u64

font_db_revision: u64

fallback_policy_key: u64

Fingerprint of the effective font fallback policy (locale + family config + injection).

This is intended for diagnostics only.

frame_missing_glyphs: u64

Total count of missing/tofu glyphs observed across text prepared this frame.

Implementation note: this is currently approximated as the number of shaped glyphs whose glyph id is 0 (the .notdef glyph) across prepared text runs.

frame_texts_with_missing_glyphs: u64

Count of prepared text blobs that contained at least one missing/tofu glyph.

blobs_live: u64

blob_cache_entries: u64

shape_cache_entries: u64

measure_cache_buckets: u64

shape_cache_bytes_estimate_total: u64

Best-effort heap byte estimates for text caches (CPU-side).

These values are intended for diagnostics only. They are approximate and may under-count allocator overhead and shared allocations.

blob_paint_palette_bytes_estimate_total: u64

blob_decorations_bytes_estimate_total: u64

unwrapped_layout_cache_entries: u64

frame_unwrapped_layout_cache_hits: u64

frame_unwrapped_layout_cache_misses: u64

frame_unwrapped_layouts_created: u64

frame_cache_resets: u64

frame_blob_cache_hits: u64

frame_blob_cache_misses: u64

frame_blobs_created: u64

frame_shape_cache_hits: u64

frame_shape_cache_misses: u64

frame_shapes_created: u64

mask_atlas: RendererGlyphAtlasPerfSnapshot

color_atlas: RendererGlyphAtlasPerfSnapshot

subpixel_atlas: RendererGlyphAtlasPerfSnapshot

registered_font_blobs_count: u64

Best-effort process-local font database/cache counters.

These are intended to help attribute CPU-side footprint concerns (e.g. “too many injected font blobs”) without requiring heap profilers.

registered_font_blobs_total_bytes: u64

family_id_cache_entries: u64

baseline_metrics_cache_entries: u64

Trait Implementations

impl Clone for RendererTextPerfSnapshot

fn clone(&self) -> RendererTextPerfSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RendererTextPerfSnapshot

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

Formats the value using the given formatter.

impl Default for RendererTextPerfSnapshot

fn default() -> RendererTextPerfSnapshot

Returns the “default value” for a type.

impl Copy for RendererTextPerfSnapshot