Remove V8 debug symbols to improve build performance (#70)

Cache the build artifacts of V8 to avoid having to recompile every time

.travis.yml

@@ -4,6 +4,10 @@ branches:
   only:
     - master
 
+cache:
+  directories:
+  - $HOME/build/sqreen/PyMiniRacer/py_mini_racer/extension/v8/
+
 matrix:
   include:
     - dist: trusty

build_mac_os_x_wheels.sh

@@ -1,6 +1,8 @@
 set -e
 set -x
 
+PATH_TO_V8=$HOME/build/sqreen/PyMiniRacer/py_mini_racer/extension/v8/
+
 for PYVERSION in 2.7 3.4 3.5 3.6 3.7; do
     curl https://bootstrap.pypa.io/get-pip.py | python
     pip install virtualenv
@@ -11,7 +13,13 @@ for PYVERSION in 2.7 3.4 3.5 3.6 3.7; do
     . ./venv_${PYVERSION}/bin/activate
     pip install certifi
     pip install -r requirements/setup.txt
-    python setup.py build_v8
+
+    # Recyling V8
+    if [ ! -d $PATH_TO_V8 ] || [ -z "$(ls -A $PATH_TO_V8)" ]; then
+        rm -rf $PATH_TO_V8
+        python setup.py build_v8
+    fi
+
     export LDSHARED="clang++ -bundle -undefined dynamic_lookup -arch i386 -arch x86_64"
     python setup.py bdist_wheel
     deactivate

py_mini_racer/extension/v8_build.py

@@ -101,8 +101,9 @@ def gen_makefiles(path):
         'v8_monolithic': 'true',
         'use_gold': 'false',
         'use_allocator_shim': 'false',
-        'symbol_level': '1',
-        'strip_debug_info': 'false',
+        'is_debug': 'false',
+        'symbol_level': '0',
+        'strip_debug_info': 'true',
         'v8_use_external_startup_data': 'false',
         'v8_enable_i18n_support': 'false',
         'v8_static_library': 'true',