Inline Bytes::next and Bytes::size_hint.

nnethercote · nnethercote · commit ca7eef71853e · 2023-10-12T17:55:42.000+11:00
This greatly increases its speed.
diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
@@ -2778,6 +2778,7 @@ 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 {
@@ -2790,6 +2791,7 @@ impl<R: Read> Iterator for Bytes<R> {
         }
     }
 
+    #[inline]
     fn size_hint(&self) -> (usize, Option<usize>) {
         SizeHint::size_hint(&self.inner)
     }

Original file line number	Diff line number	Diff line change
`@@ -2778,6 +2778,7 @@ pub struct Bytes<R> {`
`2778`	`2778`	`impl<R: Read> Iterator for Bytes<R> {`
`2779`	`2779`	`type Item = Result<u8>;`
`2780`	`2780`
	`2781`	`+ #[inline]`
`2781`	`2782`	`fn next(&mut self) -> Option<Result<u8>> {`
`2782`	`2783`	`let mut byte = 0;`
`2783`	`2784`	`loop {`
`@@ -2790,6 +2791,7 @@ impl<R: Read> Iterator for Bytes<R> {`
`2790`	`2791`	`}`
`2791`	`2792`	`}`
`2792`	`2793`
	`2794`	`+ #[inline]`
`2793`	`2795`	`fn size_hint(&self) -> (usize, Option<usize>) {`
`2794`	`2796`	`SizeHint::size_hint(&self.inner)`
`2795`	`2797`	`}`