Re: XCode on Intel/Mac
Re: XCode on Intel/Mac
- Subject: Re: XCode on Intel/Mac
- From: email@hidden
- Date: Fri, 20 Jan 2006 15:59:05 -0800
Just curious - what is the cause of this (or what do you think it
is)? All of the following statements are based on memory so they
may be incorrect, but if they are correct, the performance makes
sense to me. I believe that Intel chips are generally better than
PowerPC for integer instructions (although the G5 is much better
for floating point instructions) and compiling is just about all
integer instructions if not 100% integer instructions. Isn't the
memory in the new Intel iMac faster than the memory in the new
PowerMac? Better integer performance and faster memory (which is
often the bottleneck) means that even with twice as many processors
it's just slightly better.
Someone please correct me if my memory isn't correct.
Your memory is more or less correct... I won't be any more
affirmative for the risk of starting a flame war, as topics such as
these typically do. :)
One point worth noting though is the difference in how the two
architectures handle bad code, which is 99% of what's out there. I'm
far from an expert myself, but the word I'm getting from a few
sources is that Intel's chips are much better with bad code. gcc is
the epitome of that - it's big, disgusting and full of unused
functionality; as compared to media applications, where of course the
PPC traditionally excels, which lend themselves relatively easily to
vectorisation and other such optimisations.
The fundamental bottom line, through these comparisons, is that the
PPC relies on a good compiler, while Intel relies on good hardware
engineers. And all we've got is gcc. And Intel does have some very
good engineers.
Wade
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