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| author | kennytm <kennytm@gmail.com> | 2018-12-01 01:05:51 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-12-01 01:05:51 +0800 |
| commit | c3950c84c0ce89d6aad6f95042836912ce3ff3dc (patch) | |
| tree | 1e36efb761987cc72d3f8a519dc0516f67e76b92 /src/liballoc | |
| parent | e40f37e39dd1cbb0b6158bf120931f6cc4a0c43b (diff) | |
| parent | 591607d237665857880e16899788517b9b82d414 (diff) | |
| download | rust-c3950c84c0ce89d6aad6f95042836912ce3ff3dc.tar.gz rust-c3950c84c0ce89d6aad6f95042836912ce3ff3dc.zip | |
Rollup merge of #56131 - ljedrz:assorted, r=RalfJung
Assorted tweaks - preallocate `VecDeque` in `Decodable::decode` (as it is done with other collections which can do it) - add a FIXME to `String::from_utf16` r? @RalfJung
Diffstat (limited to 'src/liballoc')
| -rw-r--r-- | src/liballoc/string.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/liballoc/string.rs b/src/liballoc/string.rs index 8d009101ce7..0b25d911a29 100644 --- a/src/liballoc/string.rs +++ b/src/liballoc/string.rs @@ -618,6 +618,8 @@ impl String { /// ``` #[stable(feature = "rust1", since = "1.0.0")] pub fn from_utf16(v: &[u16]) -> Result<String, FromUtf16Error> { + // This isn't done via collect::<Result<_, _>>() for performance reasons. + // FIXME: the function can be simplified again when #48994 is closed. let mut ret = String::with_capacity(v.len()); for c in decode_utf16(v.iter().cloned()) { if let Ok(c) = c { |