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I tried this code:
https://git.libre-chip.org/libre-chip/fayalite/src/commit/25aa90ec603acdc49a984588e75ba62d7f16b5c4
I expected to see this happen: compile in a reasonably short time
Instead, this happened:
running cargo +nightly rustc -p fayalite -- -Z time-passes gives small times for everything except:
time: 25.136; rss: 396MB -> 782MB ( +386MB) MIR_borrow_checking
time: 22.335; rss: 782MB -> 973MB ( +191MB) MIR_effect_checking
I'm running on a Ryzen 9 7950X so this isn't just a slow cpu.
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rustc --version --verbose:
rustc 1.81.0-nightly (8337ba918 2024-06-12)
binary: rustc
commit-hash: 8337ba9189de188e2ed417018af2bf17a57d51ac
commit-date: 2024-06-12
host: x86_64-unknown-linux-gnu
release: 1.81.0-nightly
LLVM version: 18.1.7
compilation is also quite slow on 1.79.0 stable, using RUSTC_BOOTSTRAP=1 cargo rustc -p fayalite -- -Z time-passes:
time: 24.300; rss: 389MB -> 768MB ( +379MB) MIR_borrow_checking
time: 21.751; rss: 768MB -> 958MB ( +191MB) MIR_effect_checking
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Area: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: The borrow checkerArea: The borrow checkerCategory: This is a bug.Category: This is a bug.Call for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.Relevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.