Commits on Jul 20, 2017

1. std: Cut down #[inline] annotations where not necessary …

   This PR cuts down on a large number of `#[inline(always)]` and `#[inline]`
   annotations in libcore for various core functions. The `#[inline(always)]`
   annotation is almost never needed and is detrimental to debug build times as it
   forces LLVM to perform inlining when it otherwise wouldn't need to in debug
   builds. Additionally `#[inline]` is an unnecessary annoation on almost all
   generic functions because the function will already be monomorphized into other
   codegen units and otherwise rarely needs the extra "help" from us to tell LLVM
   to inline something.
   
   Overall this PR cut the compile time of a [microbenchmark][1] by 30% from 1s to
   0.7s.
   
   [1]: https://gist.github.com/alexcrichton/a7d70319a45aa60cf36a6a7bf540dd3a

   

   alexcrichton committed Jul 20, 2017
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