Slightly improve perf of internal Maybe type
#157
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- Switch to having a single instance of the Nothing type. - Similarly, make sure there is only a single constant value for the Just type discriminant, even though the instance must be constructed dynamically per each value it wraps. - Update to use constant numbers as sentinel values instead of strings. This is, even all combined, a *very* small win... but it isn't zero!
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Justtype discriminant, even though the instance must be constructed dynamically per each value it wraps.This is, even all combined, a very small win... but it isn't zero!