REFCNTS!

tvgen.pl
  copy tvcommon.[ch] if newer

*** SCALING UP

torture test

allow treefill/depth updates to be switched off temporarily?
  reduce the need for write locks == parallel insert mode!

bulk insert/delete (for arrays)??

perl interface
  REFCNT!
  push/unshift & pop/shift flags
  transient hash-ref indices?
  tied array API & glue
  array: mapkeys / mapvalues?

OPTIMIZE!
  bigger better benchmarks

tc_delete
  try 2-level rotations?

compile option for dynamically sized node arrays?

for t in ./t/0*; do echo $t; perl -Mblib -w $t; done

