From 499f485f3d34a53fcedb4a2ea95f9aff9bff8241 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Fri, 29 May 2015 14:19:39 -0700
Subject: [PATCH] Don't allocate in PackageId::hash

This hash function is called an enormous number of times in `cargo_rustc`, so
optimizing it is fairly important, and it's also quite trivial to not allocate a
string at all (`semver::Version::hash` already does everything we need).
---
 src/cargo/core/package_id.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cargo/core/package_id.rs b/src/cargo/core/package_id.rs
index 992e06b9e..f585a0137 100644
--- a/src/cargo/core/package_id.rs
+++ b/src/cargo/core/package_id.rs
@@ -59,7 +59,7 @@ impl Decodable for PackageId {
 impl Hash for PackageId {
     fn hash<S: hash::Hasher>(&self, state: &mut S) {
         self.inner.name.hash(state);
-        self.inner.version.to_string().hash(state);
+        self.inner.version.hash(state);
         self.inner.source_id.hash(state);
     }
 }
-- 
2.30.2