Java Glossary : widthInBits

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widthInBits

Here are two implementations of a method to calculate the width of a number in bits, sort of the inverse of calculating 2 ** n. There were eight submissions. I have retained the slowest a method that uses Math.log, and the fastest (19 times faster) that uses a fully unraveled binary search.

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binary ¤ bit count ¤ logarithm ¤ power ¤ width in digits

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