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On my machine, cargo build on async-rs/async-std@1d87583 finishes in ~6.75s on stable 1.41.0, but takes at least 8.50s on the current beta (1.42.0-beta.2 (3d2613e 2020-02-04)), an increase of ~25%.
Recent nightlies are still affected, but my perf improvements in #68606 and #68672 improve things a bit which hides the regression.
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Area: Async & AwaitAsync-await issues that have been triaged during a working group meeting.Category: This is a bug.Call for participation: This issue needs bisection: https://github.com/rust-lang/cargo-bisect-rustcCall for participation: This issue has a repro, but needs a Minimal Complete and Verifiable ExampleIssue: Problems and improvements with respect to compile times.High priorityRelevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from stable to beta.
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