Re: build times
Re: build times
- Subject: Re: build times
- From: Dennis Munsie <email@hidden>
- Date: Fri, 4 Dec 2009 23:23:52 -0500
Ok, that was fast -- I just did some poking around, and it turned out I had distributed builds turned on in Xcode. That was causing it to try to distribute the build, but since there was nothing to distribute to, other than itself, the overhead was killing my build. The new time is as follows:
i5, 4 cores, 0m49.485s
Much better...
dennis
On Fri, Dec 4, 2009 at 10:37 PM, Dennis Munsie
<email@hidden> wrote:
Hi everyone --
I just purchased a new iMac 27" with the quad i5, and I've been doing some build time tests between it and my older 2GHz C2D MacBook w/4GB DDR2 RAM. I'm perplexed with the results I'm getting. Here are the results from running a clean command line ad-hoc build of one of my iPhone apps. The script removes the build directory before starting xcodebuild, so it's doing a complete build each time.
i5, 4 cores, 2m16.212s
C2D, 2 cores, 2m43.01s
a 30 second real world speed up does not look correct at all. In fact, here is one more -- I disabled 2 of the cores on the iMac, and here is what I get:
i5, 2 cores, 3m3.868s
So with two CPUs, the i5 finishes over 45 seconds slower than the C2D.
This doesn't seem right in any way -- the iMac has a faster drive and faster CPUs than the MacBook, but it's not able to build the project that much faster. Both are running 10.6.2 and Xcode 3.2.1 (64-bit). Both machines have 4GB of RAM installed, but the MacBook is unable to use all 4GB due to chipset limitations. If anything, this would give another advantage to the iMac.
I really feel like I am missing something here -- either I'm doing something wrong or I've overlooked some setting someplace. Does anyone else have any insight into what might be wrong?
Thanks!
dennis
--
dennis
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