Low Level Tools/2019Q2: Difference between revisions

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	Land 5 changes that speed up or reduce peak memory usage of rustc.		Land 5 changes that speed up or reduce peak memory usage of rustc.
			* [https://github.com/rust-lang/rust/pull/59693 Increase `Span` from 4 bytes to 8 bytes.] A big win across lots of workloads, especially larger crates: some <tt>script-servo</tt> builds are 15% faster.