Auto merge of #116775 - nnethercote:inline-Bytes-next, r=the8472

Inline `Bytes::next` and `Bytes::size_hint`. This greatly increases its speed. On one small test program using `Bytes::next` to iterate over a large file, execution time dropped from ~330ms to ~220ms. r? `@the8472`
rust-lang · Oct 16, 2023 · 1833fcc · 1833fcc
2 parents 30d310c 4d68108
commit 1833fcc
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
@@ -2777,6 2777,7 @@ pub struct Bytes<R> {
 impl<R: Read> Iterator for Bytes<R> {
  type Item = Result<u8>;
 
  #[inline]
  fn next(&mut self) -> Option<Result<u8>> {
  let mut byte = 0;
  loop {
@@ -2789,6 2790,7 @@ impl<R: Read> Iterator for Bytes<R> {
  }
  }
 
  #[inline]
  fn size_hint(&self) -> (usize, Option<usize>) {
  SizeHint::size_hint(&self.inner)
  }