Report benchmarks on travis success

Author: yurydelendik

.travis.yml

@@ -14,3 +14,6 @@ before_script:
     # rustup update makes it ready.
     - rustup update
 script: ./test-all.sh
+after_success:
+    # run benchmarks if there is a success in testing
+    - ./compare-master.sh

compare-master.sh

@@ -0,0 +1,12 @@
+#/bin/bash
+
+# record current bench results
+cargo bench --bench benchmark -- --noplot --save-baseline after
+
+# switch to master and record its bench results
+git checkout master && \\
+cargo bench --bench benchmark -- --noplot --save-baseline before
+
+# compare
+cargo install critcmp --force && \
+critcmp before after