Re: Multibyte/Wide Character Sets and Lex.

pjbumbul@math.uwaterloo.ca (Peter Bumbulis) writes:
>re2c can translate switch statements into nested ifs (usually a
>performance win.)


Why is this usually a performance win? If it is a performance win,
why don't compilers do it automatically?


--
Fergus Henderson WWW: http://www.cs.mu.oz.au/~fjh
fjh@cs.mu.oz.au PGP: finger fjh@128.250.37.3
[C compilers I know have three strategies for translating switches: a
branch table if the cases are dense, a linear lookup if there's a
small number of sparse cases, and an open-coded binary tree,
i.e. nested if's, otherwise. -John]


--

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