Improving parallelism when building with goma

tools-webrtc/ios/build_ios_libs.py

 #!/usr/bin/env python
 
 # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
@@ skipping 98 matching lines @@
   if build_type == 'static_only':
     gn_target_name = 'rtc_sdk_objc'
   elif build_type == 'framework':
     gn_target_name = 'rtc_sdk_framework_objc'
     gn_args.append('enable_dsyms=true')
     gn_args.append('enable_stripping=true')
   else:
     raise ValueError('Build type "%s" is not supported.' % build_type)
 
   logging.info('Building WebRTC with args: %s', ' '.join(gn_args))
+
   cmd = ['gn', 'gen', output_dir,
          '--args=' + ' '.join(gn_args + extra_gn_args)]
   _RunCommand(cmd)
   logging.info('Building target: %s', gn_target_name)
+
   cmd = ['ninja', '-C', output_dir, gn_target_name]
+  if use_goma:
+    cmd.extend(['-j', '200'])
   _RunCommand(cmd)
 
   # Strip debug symbols to reduce size.
   if build_type == 'static_only':
     gn_target_path = os.path.join(output_dir, 'obj', 'webrtc', 'sdk',
                                   'lib%s.a' % gn_target_name)
     cmd = ['strip', '-S', gn_target_path, '-o',
            os.path.join(output_dir, 'lib%s.a' % gn_target_name)]
     _RunCommand(cmd)
 
@@ skipping 78 matching lines @@
            'Set :CFBundleVersion ' + version_number, infoplist_path]
     _RunCommand(cmd)
     _RunCommand(['plutil', '-convert', 'binary1', infoplist_path])
 
   logging.info('Done.')
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())