Improve Travis CI build Performance

chenzhang22 · chenzhang22 · commit d4f65fd230f5 · 2021-08-17T22:07:02.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -9,3 +9,7 @@ branches:
     - master
 env:
   - RUBY=ruby GEM=gem SLOWNESS=6
+
+cache:
+  directories:
+  - $HOME/.m2
