The current version of TFramedTransport allocates new read and write buffers every time a frame is read or written. This is wasteful, leading to expensive byte allocations, soaking up cpu and GC time unnecessarily.
It would be handy to have an implementation that automatically reuses existing buffers if they're big enough, and grows them as appropriate. My testing shows this to be as much as a 60% reduction in CPU cost in dealing with the transport.
I think it's important for us to keep separate implementations available, since different applications might prefer to spend the CPU time to avoid having a big chunk of memory permanently allocated.