@lancomega: Thanks for your consideration. However, I replied after investigation of program code deeply for you. Probably, my recognition will not be wrong. Apparently we can easily see this matter, but this is not simple. I recommend that you chase program code, too.
The reasons (Result of my investigation):
1. Meta data is related to basic DB query deeply
2. If you add information later to each record in layer, performance worsen by all means.