Which is faster 'if else if' or 'switch'? test on C++, PHP, PERL, Java, Pascal, JavaScript, Haskell.

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This was interesting, but in if else if else trees I normally think a lot about what the most common cases of data are expected to be and makes sure those ones require the fewest comparison tests in the way that I write it, i.e. you should only have to check everything relatively rarely. If some of the comparisons are very light and quick and others are heavy, I normally try to put the light ones first, and only do the heavier ones as needed.
I'm still going to watch both videos, but "average number of comparisons to choose a case" can vary wildly depending on how you write it, or at least, in the past it often did for me.

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