Re: Xcode Performance on 8-Core Macs
Re: Xcode Performance on 8-Core Macs
- Subject: Re: Xcode Performance on 8-Core Macs
- From: "Bob Currier" <email@hidden>
- Date: Sun, 15 Apr 2007 09:14:24 -0700
On Sun, Apr 15, 2007 8:27 AM, Jim Correia <email@hidden> wrote:
>On Apr 15, 2007, at 10:59 AM, Bob Currier wrote:
>
>> What I'm seeing is 8 files start compiling (as expected) and then they
>> seem to deadlock for a long (long!) time. We're talking 5 minutes to
>> compile 8 small vanilla C files. Then the next file gets compiled and
>> things get progressively faster the more files are compiled, until the
>> last few (out of 150-odd files) are running at "normal" speed.
>
>This may be relevant
>
><http://lists.apple.com/archives/xcode-users/2006/Dec/msg00080.html>
>
>> Is there a way to reduce the number of cores being used? The
>> purpose of
>> getting this box was not to speed compiles--I'm satisfied with the 4-
>> core speed.
>
>You can control this with PBXNumberOfParallelBuildSubtasks. See the
>"Expert Preferences Notes" from the help menu.
Thanks for that. Cutting back to 4 subtasks put me back where I started.
Excellent!
Cutting back to 2 further reduced the delay at the start of a full
build, but slowed down the rest of the (lengthy) build. So I'll stick with 4.
Thanks for the quick response.
-- Bob
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