From b8fb6e103294f8a6028122df2650fff84f2e3e14 Mon Sep 17 00:00:00 2001
From: Michael Howell <michael@notriddle.com>
Date: Tue, 26 Jul 2022 12:23:59 -0700
Subject: [PATCH] rustdoc: do not allocate String when writing path full name

No idea if this makes any perf difference, but it just seems like premature
pessimisation to use String when str will do.
---
 src/librustdoc/clean/types.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustdoc/clean/types.rs b/src/librustdoc/clean/types.rs
index 2d364f3402e96..83d8ed3fc87fb 100644
--- a/src/librustdoc/clean/types.rs
+++ b/src/librustdoc/clean/types.rs
@@ -2175,8 +2175,8 @@ impl Path {
     pub(crate) fn whole_name(&self) -> String {
         self.segments
             .iter()
-            .map(|s| if s.name == kw::PathRoot { String::new() } else { s.name.to_string() })
-            .intersperse("::".into())
+            .map(|s| if s.name == kw::PathRoot { "" } else { s.name.as_str() })
+            .intersperse("::")
             .collect()
     }