If multiple ifs are too slow in determining which interval a value is in: Depending on how large a universe of possible values you have, it might be quicker to build in advance a table of all those values, one interval's worth per line, and use wholeMatches true and lineOffset to determine which interval you're in. If the intervals are all the same size, some sort of arithmetic-and-rounding function might process the original values, and compare them with an abbreviated table.
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