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Any reasonably good optimizing compiler will implement that switch statement as a jump table so it's really just one conditional branch even though it doesn't l

by minimax 10y ago

Any reasonably good optimizing compiler will implement that switch statement as a jump table so it's really just one conditional branch even though it doesn't look like it.

rurban 10y ago
But this compiler will add unneeded bounds checking (3-10% perf. hit). A computed goto table would fix that. (on modern compilers). Anyway, Lemire's fastrange modulo solved that problem better. https://github.com/lemire/fastrange https://github.com/lemire/fastrange There's no need for a slow modulo.