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Add NEWS on precompilation #44325

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Mar 3, 2022
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Add NEWS on precompilation #44325

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7 changes: 7 additions & 0 deletions NEWS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,12 @@ Compiler/Runtime improvements
Code heavily dependent on constant propagation should see significant compile-time performance improvements and
certain cases (e.g. calls to uninlinable functions that are nevertheless effect free) should see runtime performance
improvements. Effects may be overwritten manually with the `@Base.assume_effects` macro ([#43852]).
* Precompilation (with explicit `precompile` directives or representative workloads) now saves more type-inferred code,
resulting in reduced time-to-first task for packages that use precompilation. This change also eliminates the
runtime performance degradation occasionally triggered by precompilation on older Julia versions. More specifically,
any newly-inferred method/type combinations needed by your package--regardless of where those methods were
defined--can now be cached in the precompile file, as long as they are inferrably called by a method owned by
your package ([#43990]).

Command-line option changes
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Expand Down Expand Up @@ -274,5 +280,6 @@ Tooling Improvements
[#43852]: https://github.com/JuliaLang/julia/issues/43852
[#43865]: https://github.com/JuliaLang/julia/issues/43865
[#43919]: https://github.com/JuliaLang/julia/issues/43919
[#43990]: https://github.com/JuliaLang/julia/issues/43990
[#44080]: https://github.com/JuliaLang/julia/issues/44080
[#44136]: https://github.com/JuliaLang/julia/issues/44136