Message2245

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Oooooh.  I wish I could have used Java for this -- nice port!
One caution:  the assert() calls add significant expense.  In 
CPython, the preprocessor removes them in our release 
build.  When you get confidence in this port, you may want 
to make assert() a nop too.  Most (almost all? all?) of them 
are asserting preconditions that ensure the algorithm won't 
make any out-of-bounds array references, but Java already 
checks that for you (in C, of course, it's a nightmare of 
corruption and segfaults when indices go rogue).