17 lines
847 B
ReStructuredText
17 lines
847 B
ReStructuredText
=================
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Cretonne in Rustc
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=================
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The Rust compiler currently uses LLVM as its optimizer and code generator for both debug and
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release builds. The Cretonne project does not intend to compete with LLVM when it comes to
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optimizing release builds, but for debug builds where compilation speed is paramount, it makes
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sense to use Cretonne instead of LLVM.
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- Cretonne is designed to take advantage of multi-core CPUs, making parallel code generation quite
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easy. This is harder with LLVM which was designed before multi-core CPUs where mainstream.
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- Cretonne is designed with compilation speed in mind. It makes engineering tradeoffs that favor
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compilation speed over advanced optimizations.
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See `the discussion on the Rust internals forum
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<https://internals.rust-lang.org/t/possible-alternative-compiler-backend-cretonne>`_.
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