Optimal structure

[Anton Gavazuk]

Hello all!
I have the question about optimal structure of repository

root
      nodeTypeA
      ...
      nodeTypeB
      ...
      nodeTypeC


or

root
     rootForA
           nodeTypeA
           ...
     rootForB
           nodeTypeB
           ...
     rootForC
           nodeTypeC
           ...


Is there anything which can impact on prefomance or on maintainability?