These results demonstrate that implementation language matters, and that C++ delivers a significant performance advantage. What a strange thing to say, given t

These results demonstrate that implementation language matters, and that C++ delivers a significant performance advantage. What a strange thing to say, given that it's probably very likely that the implementations probably work pretty differently internally. You'd probably see similar differences with such a different implementation no matter the language, assuming it isn't something ridiculous like Ruby (I'm a Ruby programmer, don't bite). Secondly, isn't the overhead for a database mostly disk IO? I realize a finely tuned DB/server is probably CPU-bound instead, but that's generally assuming that the working set fits snugly into RAM and gets cached. Which may not quite be the case when you operate the scale at which you'd resort to HBase/HyperTable.