Re: XCode on Intel/Mac
Re: XCode on Intel/Mac
- Subject: Re: XCode on Intel/Mac
- From: David Reed <email@hidden>
- Date: Fri, 20 Jan 2006 18:14:05 -0500
On Jan 20, 2006, at 11:35 AM, Chris Espinosa wrote:
On Jan 20, 2006, at 7:21 AM, Matt Gough wrote:
On 19 Jan 2006, at 01:04, Chris Espinosa wrote:
How is the compile speed on the new machines?
On an iMac Core Duo, a tick or two slower than a Quad G5.
Are you saying that the overall compile speed of an entire project
is about the same with all cores being used at once, or that the
time for a single file compile is about the same?
In our tests, a large C++ project finishes a full clean build
slightly (a matter of seconds) sooner on a Quad Tower than it does
on a Core Duo iMac. So the 2-core Intel is only slightly slower
than the 4-core Quad for full builds.
Warning: every project is different, and the dynamics of disk and
cache speed and latency, processor saturation, process threading,
and system memory will affect your results significantly. But we
are very pleased with the IDE and compiler performance on the Intel
chip.
Chris
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.
Dave
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