> I found out that I was getting vastly different speeds even on the same > exr version depending on whether I built libIlmImf myself or used the > system libraries. It seems to have boiled down to compiler releases (gcc > 4.4 vs gcc 4.8 vs clang -- the latter two make much faster code for some > reason) >
I've seen similar things, at least with gcc 4.1 vs 4.8, with the latter begin significantly faster in certain decode situations (like 10-15% faster). Karl
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