Whats faster: returning JSON from C++ as String or as JSON objects

Question

I have like 25000 records I want to give back to the calling JS from my WinRT component.

Currently I use a Map to transform the records. This is slow.

auto row = ref new Platform::Collections::Map<Platform::String^, Platform::Object^>();

    int columnCount = ColumnCount();
    for (int i = 0 ; i < columnCount; ++i) {
      auto name = ColumnName(i);
      row->Insert(name, GetColumn(i));
    }

    return row->GetView();

Now I wonder if it would be faster to construct the JSON objects using the WinRT Json API or just hand over a string containing the JSON and let Chakra do the parsing on the JS side. Using Json WinRT objects would still yield a call back to C++ realm when they are accessed from the JS side, wouldn't it?

Answer 1

Update: Returning a Platform::String^ of JSON is actually ~10 times fasters. Go figure.