Resource: optimize shader and material compile times#868
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dbartolini merged 7 commits intoJun 2, 2026
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Sort shader defines before building variant names so differently ordered define lists describe the same shader variant. Materials use the canonical variant ID returned by shader compilation, and static shader compile entries are de-duplicated after sorting.
Avoid launching shaderc's preprocess pass when a shader compile does not need uniform metadata and has no sampler-stage metadata to discover. In that case the generated vertex and fragment sources are written directly and only the binary compile remains.
Cache material metadata-only shader variant compiles for the duration of a data-compiler run. Cache hits restore the shader library, uniform metadata and sampler metadata, then replay the original source dependencies so invalidation still observes the same inputs.
Cache shader-name to shader-library lookups for the duration of a data-compiler run. Material metadata compilation can retry cache lookup with a known library and avoid repeatedly scanning every shader resource when materials omit the library name.
When a full static shader compile already has to run the preprocess pass for sampler metadata, collect uniform metadata at the same time and store the result in the material metadata cache. Later matching material compiles can reuse that metadata instead of preprocessing the same variant again.
Spawn shaderc processes for every backend target before running the preprocess metadata pass, using distinct temp output paths so concurrent jobs do not race. While those processes run, the compiler parses sampler and uniform metadata.
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