On Thu, 06 Jul 2006 22:59:35 +0200, Clemens Eisserer said: > Just a side note: GTK-2.9.4 built with "-O2 -g -fPIC" is a lot slower > than the stuff shipped with OpenSuSE (I guess 2.8.6+). maybe the > debugging symbols cause cache misses ... I don't know but its about > 25-75% slower.
The debugging info created by -g goes into the binary on disk, but isn't loaded into memory during execution. -fPIC is more likely the culprit, as it adds extra memory references when finding the memory location of a variable under some cases. This *could* cause L1 and L2 cache thrashing, slowing things down much more than a single added opcode would seem to suggest....
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