From: bors <bors@rust-lang.org>
Date: Thu, 25 Apr 2019 15:52:08 +0000 (+0000)
Subject: Auto merge of #6867 - alexcrichton:improvements, r=ehuss
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=65629426c5934f1acf8463989db44231367fbe1f;p=cargo.git

Auto merge of #6867 - alexcrichton:improvements, r=ehuss

Backend refactorings and perf improvements

This PR is extracted from https://github.com/rust-lang/cargo/pull/6864 and then also additionally adds some commits related to performance optimizations that I noticed while profiling https://github.com/rust-lang/cargo/pull/6864. Each commit is in theory standalone and should pass all the tests, as well as being descriptive about what it's doing.
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65629426c5934f1acf8463989db44231367fbe1f