Nicholas Nethercote b043e11de2 Avoid allocations in Decoder::read_str. ...

`opaque::Decoder::read_str` is very hot within `rustc` due to its use in
the reading of crate metadata, and it currently returns a `String`. This
commit changes it to instead return a `Cow<str>`, which avoids a heap
allocation.

This change reduces the number of calls to `malloc` by almost 10% in
some benchmarks.

This is a [breaking-change] to libserialize.

2016-10-10 10:36:35 +11:00

..

lexer

Simplify start_bpos calculation in scan_comment().

2016-10-03 19:02:33 +11:00

attr.rs

fix top level attr spans

2016-09-16 21:44:15 +03:00

classify.rs

Fix fallout

2016-06-17 05:21:23 +00:00

common.rs

Use associated functions for libsyntax SepSeq constructors.

2016-02-22 23:24:42 -05:00

mod.rs

add unstable_features to ParseSess

2016-09-26 07:07:41 +02:00

obsolete.rs

Remove parsing of obsolete pre-1.0 syntaxes

2016-09-13 23:33:50 +03:00

parser.rs

Rollup merge of #34764 - pnkfelix:attrs-on-generic-formals, r=eddyb

2016-10-01 19:22:39 +05:30

token.rs

Avoid allocations in Decoder::read_str.

2016-10-10 10:36:35 +11:00