Speed up the inherent impl overlap check #68911
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@bors try @rust-timer queue |
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Speed up the inherent impl overlap check This gives a ~7% improvement in compile times for the stm32f0(x2) crate. Also addresses @eddyb's comment in #68837 (comment).
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☀️ Try build successful - checks-azure |
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Queued a5b4dc5 with parent 442ae7f, future comparison URL. |
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| @@ -666,7 +666,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { | |||
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| // The `Future` trait has only one associted item, `Output`, | |||
| // so check that this is what we see. | |||
| let output_assoc_item = self.tcx.associated_items(future_trait).nth(0).unwrap().def_id; | |||
| let output_assoc_item = self.tcx.associated_items(future_trait)[0].def_id; | |||
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I think this pattern (or worse, looking things up by name) should be replaced with lang items.
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Yeah, definintely. This was a huge pain when working on generators, since the declaration order of the assoc. types is significant. Not something I'll try to fit in this PR though.
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Looks like this made |
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☔ The latest upstream changes (presumably #65232) made this pull request unmergeable. Please resolve the merge conflicts. |
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r=me after rebase |
petrochenkov
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This reduces the number of `associated_item` queries done here.
Quickly skip impls that do not define any items with the same name
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@bors r=petrochenkov |
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📌 Commit 58a9284 has been approved by |
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…=petrochenkov Speed up the inherent impl overlap check This gives a ~7% improvement in compile times for the stm32f0(x2) crate. Also addresses @eddyb's comment in rust-lang#68837 (comment).
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…=petrochenkov Speed up the inherent impl overlap check This gives a ~7% improvement in compile times for the stm32f0(x2) crate. Also addresses @eddyb's comment in rust-lang#68837 (comment).
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…=petrochenkov Speed up the inherent impl overlap check This gives a ~7% improvement in compile times for the stm32f0(x2) crate. Also addresses @eddyb's comment in rust-lang#68837 (comment).
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Rollup of 5 pull requests Successful merges: - #68738 (Derive Clone + Eq for std::string::FromUtf8Error) - #68742 (implement AsMut<str> for String) - #68881 (rustc_codegen_llvm: always set AlwaysPreserve on all debuginfo variables) - #68911 (Speed up the inherent impl overlap check) - #68913 (Pretty-print generic params and where clauses on associated types) Failed merges: r? @ghost
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Rustup to rust-lang/rust#68911 changelog: none
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This gives a ~7% improvement in compile times for the stm32f0(x2) crate.
Also addresses @eddyb's comment in #68837 (comment).