[ajinkyakale]

I should have mentioned you (arun_sriniv) as the co-developer of data.table! Thanks for all the hard work. And yes, memory usage will be interesting as that is the bottleneck when it comes to large dataset. I am working on something on those lines. Will post something soon :)

[arun_sriniv]

No worries :-). And glad to hear you're working on it! Let me know if I can be of any help.