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| author | bors <bors@rust-lang.org> | 2019-06-16 14:58:05 +0000 |
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| committer | bors <bors@rust-lang.org> | 2019-06-16 14:58:05 +0000 |
| commit | e3175c34b4211d219f114d6dc608194ebaf03c44 (patch) | |
| tree | 564893b6b6114d8cf403a70cb76304ecb8cbab8f /src/test/ui/thinlto | |
| parent | 37b6a5e5e82497caf5353d9d856e4eb5d14cbe06 (diff) | |
| parent | 0baa9258dd2f901a24d744705f514fa678e64940 (diff) | |
| download | rust-e3175c34b4211d219f114d6dc608194ebaf03c44.tar.gz rust-e3175c34b4211d219f114d6dc608194ebaf03c44.zip | |
Auto merge of #61754 - nikomatsakis:trait-caching-perf-3, r=pnkfelix
create a "provisional cache" to restore performance in the case of cycles Introduce a "provisional cache" that caches the results of auto trait resolutions but keeps them from entering the *main* cache until everything is ready. This turned out a bit more complex than I hoped, but I don't see another short term fix -- happy to take suggestions! In the meantime, it's very clear we need to rework the trait solver. This resolves the extreme performance slowdown experienced in #60846 -- I plan to add a perf.rust-lang.org regression test to track this. Caveat: I've not run `x.py test` in full yet. r? @pnkfelix cc @arielb1 Fixes #60846
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