Add Release configurations and optimizations

Author: aminya

binding.gyp

@@ -130,6 +130,40 @@
                     "NOMINMAX"
                 ],
             }]
-        ]
-    }
+        ],
+        'default_configuration': 'Release',
+        'configurations': {
+          # Release Settings
+          'Release': {
+            'defines': [ 'NDEBUG' ],
+            "cflags": [ "-fno-exceptions", "-Ofast" ],
+            "cflags_cc": [ "-fno-exceptions", "-Ofast", "-std=c++<(STANDARD)" ],
+            "xcode_settings": {
+              'GCC_OPTIMIZATION_LEVEL': '3', # stop gyp from defaulting to -Os
+              "CLANG_CXX_LIBRARY": "libc++",
+              "CLANG_CXX_LANGUAGE_STANDARD": "c++<(STANDARD)",
+              'MACOSX_DEPLOYMENT_TARGET': "<(MACOSX_DEPLOYMENT_TARGET)"
+            }, # XCODE
+            "msvs_settings": {
+              "VCCLCompilerTool": {
+                'ExceptionHandling': 0,               # /EHsc
+                'MultiProcessorCompilation': 'true',
+                'RuntimeTypeInfo': 'false',
+                'Optimization': 3,              # full optimizations /O2  ==  /Og /Oi /Ot /Oy /Ob2 /GF /Gy
+                'StringPooling': 'true',        # pool string literals
+                "AdditionalOptions": [
+                  # C++ standard
+                  "/std:c++<(STANDARD)",
+
+                  # Optimizations
+                  "/O2",
+                  # "/Ob3",  # aggressive inline
+                  "/GL",   # whole Program Optimization  # /LTCG is implied with /GL.
+                  "/DNDEBUG"  # turn off asserts
+                ],
+              }
+            } # MSVC
+          }, # Release
+        }, # configurations
+    } # target-defaults
 }