Merge branch 'master' into no-fallible-casts

.travis.yml

@@ -3,4 +3,7 @@ rust:
   - stable
   - beta
   - nightly
- 
+git:
+  depth: 10
+after_success:
+  ./.travis_bench.sh

.travis_bench.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# Clone the repository
+REMOTE_URL="$(git config --get remote.origin.url)";
+cd ${TRAVIS_BUILD_DIR}/.. && \
+git clone ${REMOTE_URL} "${TRAVIS_REPO_SLUG}-bench" && \
+cd  "${TRAVIS_REPO_SLUG}-bench" && \
+
+# Bench master
+git checkout master && \
+cargo bench -- --noplot --save-baseline before && \
+
+# Bench current branch
+git checkout ${TRAVIS_COMMIT} && \
+cargo bench -- --noplot --save-baseline after && \
+
+# Install https://github.com/BurntSushi/critcmp
+cargo install critcmp --force && \
+
+# Compare the two generated benches
+critcmp before after;