Am 14.07.2013 09:56, schrieb SomeDude:
On Wednesday, 10 July 2013 at 17:25:31 UTC, Sean Kelly wrote:
On Jul 9, 2013, at 11:12 AM, Paulo Pinto <pj...@progtools.org> wrote:
A bit off-topic, but well worth reading,
http://sealedabstract.com/rants/why-mobile-web-apps-are-slow/
Oh, regarding ObjC (and I'll qualify this by saying that I'm not an
ObjC programmer). My understanding is that ObjC was originally
reference counted (ARC = Automatic Reference Counting). Apple then
introduced a mark & sweep GC for ObjC and then in the following
release deprecated it and switched back to ARC for reasons I don't
recall. However, reference counting *is* garbage collection, despite
what that slide suggests. It just behaves in a manner that tends to
spread the load out more evenly across the application lifetime.
C++ has gone te ARC route as well with shared_ptr. I find the
scoped_ptr/shared_ptr combination quite convenient and quite safe overall.
The main problem is that C++ compilers are not shared_ptr aware.
So while systems like Objective-C ARC and ParaSail do minimize
increment/decrement operations, by removed superfluous pairs of
operations, in C++'s case you get some performance lost because of those
operations everywhere when pointers ownership changes.
--
Paulo
