On Thu, 2008-11-20 at 14:49 -0500, Andrew Overholt wrote: > * Andrew Haley <aph@xxxxxxxxxx> [2008-11-20 12:00]: > > Sure, the number of users is low, but on lower-performance boxes the > > penalty of not having gcj and gcj-compiled packages available is quite > > severe. > > Do we have numbers on this? I know you are correct but having hard > numbers would be nice. I only have anecdotal evidence (I did these experiments a long time ago). Running eclipse fully interpreted, through for example jamvm (sadly not packaged for Fedora yet), is on the order of 4 to 8 times as slow as running eclipse interpreted with gij and aot-compiled core class libraries. And the jamvm interpreter is faster than the standard interpreter that comes with hotspot. Comparing gij on a pure-bytecode program versus a the same compiled aot with gcj doesn't directly give you the correct (hard) numbers though. Since gij will at least use the aot compiled core-library (so at least things like your String operations and HashMaps, etc are optimized). I believe Andrew Hughes (CCed) has a zero-on-x86 install. So he might be able to give a real number of how much slower zero-interpreted against full hotspot and/or a fully gcj native compiled program is. Cheers, Mark -- fedora-devel-java-list mailing list fedora-devel-java-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-devel-java-list
