On 5 jun 2007, at 03:49, Francisco Reyes wrote:
Looking at the compiler parameters I see: -Og generate smaller code -OG generate faster code (default) Is the difference in speed/size significant?
Usually not.
-O1 level 1 optimizations (quick optimizations) -O2 level 2 optimizations (-O1 + slower optimizations) -O3 level 3 optimizations (-O2 repeatedly, max 5 times) Is it safe to use any of those?
Yes.
When, if at all, it could be a bad idea to use them?
When you want to debug the result, or when you want a quick compile (higher optimization levels take more time).
-Op<x> target processor: -Op1 set target processor to 386/486 -Op2 set target processor to Pentium/PentiumMMX (tm) -Op3 set target processor to PPro/PII/c6x86/K6 (tm) -Op4 set target processor to Pentium 4 (tm) -Op5 set target processor to Pentium M (tm) Which of those would be 586 and 686 type CPUs? Specially AMD cpus. Like. CPU: AMD Duron(tm) Processor (902.05-MHz 686-class CPU)
-Op3. It will make very little difference though. Jonas _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
