This is the contrary. In Obj-c all pointers are effectively double size, but in Java, they are not.
See “Compressed oops" at http://docs.oracle.com/javase/7/docs/technotes/guides/vm/performance-enhancements-7.html Le 11 sept. 2013 à 00:18, Paul Franz <paul.p.fr...@gmail.com> a écrit : > Should be interesting to see how this plays out. When it comes to Java, when > you switch from a 32-bit JVM to a 64-bit JVM there is a 10% penalty doing so. > The main reason has to do with pointers. All pointers double in size. The > effect might be less in a Objective-C program. > > Paul Franz > > On Sep 10, 2013, at 5:47 PM, Tom Davie <tom.da...@gmail.com> wrote: > >> >> On 10 Sep 2013, at 23:30, Jean-Daniel Dupas <devli...@shadowlab.org> wrote: >> >>> >>> For ARM, 64 bit matters because the instruction set has been updated to >>> provider better performances. >>> >>> I just hope the performance boost provided by this architecture change will >>> be enough to balance the slow-down due to the increase of instruction and >>> pointer size. >> >> Note, this was actually more significant on x86, where most of the mess >> caused by CISC (like having bugger all registers) got sorted out. >> >> Tom Davie >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/cocoa-dev/paul.p.franz%40gmail.com >> >> This email sent to paul.p.fr...@gmail.com > -- Jean-Daniel _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
