build times
build times
- Subject: build times
- From: Dennis Munsie <email@hidden>
- Date: Fri, 4 Dec 2009 22:37:04 -0500
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
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