commit 9f7b18ae8979d28de7e80a7e1b3f8c2759e61978
author David Tolnay <dtolnay@gmail.com> Sun Jun 23 14:00:59 2019 -0700
committer David Tolnay <dtolnay@gmail.com> Sun Jun 23 14:00:59 2019 -0700
tree 15206c05b1651892bc6318c09ac3c1c80e27d3f0
parent b1582aafa69b250c8c5f60d5ff622823b0c606b7

Document performance of advance_to

src/discouraged.rs

diff --git a/src/discouraged.rs b/src/discouraged.rs
index 48b0fa9..6e3b43d 100644
--- a/src/discouraged.rs
+++ b/src/discouraged.rs
@@ -144,6 +144,11 @@
     /// [RFC#2544]: https://github.com/rust-lang/rfcs/pull/2544
     /// [`PathSegment`]: ../../struct.PathSegment.html
     ///
+    /// # Performance
+    ///
+    /// This method performs a cheap fixed amount of work that does not depend
+    /// on how far apart the two streams are positioned.
+    ///
     /// # Panics
     ///
     /// The forked stream that this joins with must be derived by forking this parse stream.