Make index faster by faster checking for uncommon or more rare ordinals #702
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Working on #371 starting with a trivial improvement:
Replace check for uncommon or better rarity by specialized, more efficient method. This line in index_transaction accounted 70% of the time in index_transaction, so it's worth the more verbose, less general method.
There's more potential here, as self.epoch() can likely be sped up significantly - the binary search takes an inordinate amount of time still.