Try using homebrew Travis addon to make build faster.

Author: treamology

.travis.yml

@@ -18,7 +18,7 @@ matrix:
         CROSS_TOP=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer
         CROSS_SDK=iPhoneSimulator.sdk
 
-install: if [[ $TRAVIS_OS_NAME == osx ]]; then brew upgrade cmake; fi
+# install: if [[ $TRAVIS_OS_NAME == osx ]]; then brew upgrade cmake; fi
 
 before_script:
   - wget http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz
@@ -31,3 +31,9 @@ script:
   - mkdir build && cd build
   - cmake -DCMAKE_BUILD_TYPE=Release $CMAKE_OPTIONS ..
   - cmake --build . --config Release
+
+addons:
+  homebrew:
+    packages:
+      - cmake
+    update: false