Florian Klaempfl wrote:
Just curious, did anybody have profiling results which indicate that as/is are really a bottleneck?
For Lazarus, I found that about 0.5% of the time is spent in TObject.InheritsFrom (I did two runs). About 50% of this comes from calls in TCustomForm.UpdateActions; the rest is mainly scattered. It is comparable with FillChar, CompareMemRange and CompareText. So what's a bottleneck? I'm happy it doesn't eat say 10%, 20% or even 50% of CPU time, but imho a serious improvement for a function taking 0.5% -- or more -- is worth some attention. When using '(AClass.vmtPreOrderIndex <= Self) and (Self <= AClass.vmtLastInSubtreeIndex)', those 0.5% will surely go to less than 0.1%. (Especially if it gets inlined :) ) BTW I played around a bit with valgrind/callgrind and KCacheGrind; these are very nice tools for profiling! The call graphs in KCacheGrind are really nice. Bram _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
