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perf: share one font store per font configuration across the process - #56
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evolvedlight merged 1 commit intoOct 17, 2026
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Every compiler scanned the system fonts and built its own FontStore. The scan is most of what creating a compiler costs, so the one-shot helpers paid it on every call, and each compiler kept its own copy of every font it loaded. Stores are now cached process-wide, keyed by whether system fonts are included and the font directories. With system fonts enabled, create, compile and free of a short document went from 71-77 ms to 1.4-1.8 ms after the first call. A font installed after a configuration was first used is not seen until the process restarts.
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Every
TypstCompilerscanned the system fonts and built its ownFontStore. That scan is most of what creating a compiler costs, so the static one-shot helpers (TypstCompiler.CompilePdf(source)and the like) paid for it on every call. Each live compiler also kept its own copy of every font it loaded.Font stores are now cached for the whole process, keyed by
IncludeSystemFontsand the font directories.SystemWorldreads its font book straight from the shared store, so the separate per-world copy of the book is gone.Measured with system fonts enabled, creating a compiler, compiling a short PDF and freeing it, release build on Windows:
Trade-offs, also noted in the release notes and on the
Fontsrecord:EvictCache()does not release them.Tests: new unit tests check that worlds with the same configuration share a store, that the store outlives its worlds, and that different configurations get different stores.
cargo test --releasepasses, and so do all 80 .NET tests.