Drop table
Revision
This is at least 4 times faster than java.utils.Random
Fix possible NPE
[Experimental] Use Snappy for compression, it is 4 times faster for compression and 10 times faster for decompression, downsides: 1.3% bigger files, native methods and increase a lot the final jar, not really downsides but it is what it is, I think the speed is what worth here.