calc array size, read, write totals
log total entries searched for read-my-writes
make stat logs a #define (overhead of a branch would be way too high)
cache global (doesn't seem to have a perf difference)
make blindRandomWrite option a command line option
check readMyWrites on blindRandomWrite too
refactor code plus fix bug in readThenWrite
cleanup, make readThenWrite use write_prob
s/writeprob/writepercent/
DATA_COLLECT flag to turn off unnecessary printing