Am 20.04.2011 00:05, schrieb Hans-Peter Diettrich: > Florian Klaempfl schrieb: > >> Using extended typically hides only bad numerical algorithms. There >> might be some corner cases where extended is usefull but I general I >> think it's a matter of bad algorithms. > > Some algorithms convert faster with increased accuracy.
I guess you meant converge? This might be true, but processing of extended types is also slower: the memory footprint increases and even worse, extended arrays are typically aligned to 4 or even 16 byte borders so they take 12 or 16 byte in memory. Further, more complex floating point operations than +,-,* are also typically slower when the fpu is set to extended precision. So even if an algorithm converges in less steps with extended, the overall computation time might not decrease. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
