On Tue, Jan 29, 2008 at 11:47:57PM +0000, brian m. carlson wrote: > In conclusion, there is no appreciable performance hit on any algorithm. > Note that these are all hash algorithms, but they all make heavy use of > memcpy, and are extremely CPU-intensive. OTOH the memcpy they use are statically checkable, so it's not a good test. the _chk versions of memcpy that are used are builtins in gcc that reduce to a simple memcpy if gcc was able to say statically if the bound was OK. Hash algorithms are not that good for checks for those features because their stack depth is usually thin, and boundaries easily checked. That's why I suggested testing encoding/decoding multimedia streams instead, or heavy text processors (xslt, docbook, ...) come to mind. -- ·O· Pierre Habouzit ··O madcoder@debian.org OOO http://www.madism.org
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