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Move fast paths around to gain a bit of new-solver perf Change in % compared to previous commit on 4 benchmarks. All measured locally on ragdoll (AMD RYZEN 3990X, x86_64). These benchmarks have been quite repeatable in the past, but don't exactly match perf runs. All benchmarks show change in instruction count First change is compared to baseline Commit ids may change on rebases, so these links may become outdated. | | nalgebra [check,debug,opt] | serde [check,debug, opt] | syn [check, debug, opt] | wg-grammar [check, debug, opt] | | --------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- | ------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- | | [move overflow check](https://github.com/rust-lang/rust/pull/158249/changes/039cc59ac1e2a32da460a046f2b2e479c870d0fb) | $${\color{green}-0.04\\%}$$<br> $${\color{green}-0.03\\%}$$<br> $${\color{green}-0.02\\%}$$ | $${\color{green}-0.15\\%}$$<br> $${\color{green}-0.12\\%}$$<br> $${\color{green}-0.11\\%}$$ | $${\color{green}-0.08\\%}$$<br> $${\color{green}-0.04\\%}$$<br> $${\color{green}-0.01\\%}$$ | $${\color{green}-0.32\\%}$$<br> $${\color{green}-0.31\\%}$$<br> $${\color{green}-0.29\\%}$$ | | [move fast path into evaluate_goal](https://github.com/rust-lang/rust/pull/158249/changes/8cc6291e8691df7d69e61fa322be376d0da05631) | $${\color{red}+0.61\\%}$$<br> $${\color{red}+0.60\\%}$$<br> $${\color{red}+0.43\\%}$$ | $${\color{red}+0.75\\%}$$<br> $${\color{red}+0.69\\%}$$<br> $${\color{red}+0.65\\%}$$ | $${\color{red}+0.55\\%}$$<br> $${\color{red}+0.36\\%}$$<br> $${\color{red}+0.14\\%}$$ | $${\color{red}+0.13\\%}$$<br> $${\color{red}+0.21\\%}$$<br> $${\color{red}+0.15\\%}$$ | | [remove fastpath from fullfilment loop](https://github.com/rust-lang/rust/pull/158249/changes/3536b417b53392757228279a335f89f8f7056358) | $${\color{red}+0.56\\%}$$<br> $${\color{red}+0.50\\%}$$<br> $${\color{red}+0.35\\%}$$ | $${\color{red}+3.33\\%}$$<br> $${\color{red}+2.76\\%}$$<br> $${\color{red}+2.55\\%}$$ | $${\color{red}+1.65\\%}$$<br> $${\color{red}+0.93\\%}$$<br> $${\color{red}+0.33\\%}$$ | $${\color{green}-5.06\\%}$$<br> $${\color{green}-5.00\\%}$$<br> $${\color{green}-4.65\\%}$$ | | [return stalled info from fast path](https://github.com/rust-lang/rust/pull/158249/changes/187954fb08d2d275043ff8d7a013b9534120c460) | $${\color{red}+0.16\\%}$$<br> $${\color{red}+0.16\\%}$$<br> $${\color{red}+0.12\\%}$$ | $${\color{red}+0.01\\%}$$<br> $${\color{red}+0.01\\%}$$<br> $${\color{red}+0.01\\%}$$ | $${\color{red}+0.24\\%}$$<br> $${\color{red}+0.15\\%}$$<br> $${\color{red}+0.05\\%}$$ | $${\color{green}-0.24\\%}$$<br> $${\color{green}-0.24\\%}$$<br> $${\color{green}-0.25\\%}$$ | | [move goal fast path into evaluate_goal_cold](https://github.com/rust-lang/rust/pull/158249/changes/4946875445c309d674e2500c85b1c72809f05e8c) | $${\color{red}+0.01\\%}$$<br> $${\color{red}+0.01\\%}$$<br> $${\color{red}+0.01\\%}$$ | $${\color{red}+0.02\\%}$$<br> $${\color{red}+0.02\\%}$$<br> $${\color{red}+0.02\\%}$$ | $${\color{red}+0.02\\%}$$<br> $${\color{red}+0.02\\%}$$<br> $${\color{red}+0.01\\%}$$ | $${\color{green}-0.01\\%}$$<br> $${\color{green}-0.01\\%}$$<br> $${\color{green}-0.01\\%}$$ | | [shuffle fastpaths around to before creating an evalctxt](https://github.com/rust-lang/rust/pull/158249/changes/58f22e89416534c46fde0248cb997ace6c0f662a) | $${\color{green}-0.44\\%}$$<br> $${\color{green}-0.41\\%}$$<br> $${\color{green}-0.30\\%}$$ | $${\color{green}-2.31\\%}$$<br> $${\color{green}-1.93\\%}$$<br> $${\color{green}-1.80\\%}$$ | $${\color{green}-1.29\\%}$$<br> $${\color{green}-0.77\\%}$$<br> $${\color{green}-0.29\\%}$$ | $${\color{green}-6.06\\%}$$<br> $${\color{green}-5.90\\%}$$<br> $${\color{green}-5.48\\%}$$ | | [fast path when adding goals](https://github.com/rust-lang/rust/pull/158249/changes/adbd01966efaabdab8f3b4ef7de3d504ccfb2e71) | $${\color{green}-0.62\\%}$$<br> $${\color{green}-0.58\\%}$$<br> $${\color{green}-0.41\\%}$$ | $${\color{green}-0.78\\%}$$<br> $${\color{green}-0.66\\%}$$<br> $${\color{green}-0.61\\%}$$ | $${\color{green}-0.36\\%}$$<br> $${\color{green}-0.28\\%}$$<br> $${\color{green}-0.10\\%}$$ | $${\color{green}-0.12\\%}$$<br> $${\color{green}-0.09\\%}$$<br> $${\color{green}-0.04\\%}$$ | | overall from baseline | $${\color{red}+0.24\\%}$$<br> $${\color{red}+0.23\\%}$$<br> $${\color{red}+0.16\\%}$$ | $${\color{red}+0.79\\%}$$<br> $${\color{red}+0.70\\%}$$<br> $${\color{red}+0.66\\%}$$ | $${\color{red}+0.60\\%}$$<br> $${\color{red}+0.36\\%}$$<br> $${\color{red}+0.13\\%}$$ | $${\color{green}-11.31\\%}$$<br> $${\color{green}-11.00\\%}$$<br> $${\color{green}-10.27\\%}$$ |
This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
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Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrated with other languages.
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Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.
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Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).
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