message: Enable --compilation_mode=opt to bring -O2 to the build
  This PR is part of the effort to speed up the audio loading speed.
  This PR enables --compilation_mode=opt which add -O2 flag to compiler.
diff: @@ -59,7 +59,7 @@ fi
  # Build with SSE4.2 and AVX
  if [[ "${BAZEL_CPU_OPTIMIZATION}" == "yes" ]]; then
  - args+=(--copt=-msse4.2 --copt=-mavx)
  + args+=(--copt=-msse4.2 --copt=-mavx --compilation_mode=opt)
  fi
  bazel build \
  