[chandler-users] Performance: Chandler desktop 1.0.3 RC1 on Mac OS X 10.5.6, Intel and PowerPC, profile on USB flash drive
G.J.Perrin at bton.ac.uk
Mon Feb 23 00:30:48 PST 2009
Off-list, someone wrote:
> … not many other apps are built almost exclusively in python.
Chandler aside, I often work with Python-based Plone on both PowerPC and
Intel. More on this below.
> Perhaps the Python distro for the Mac is PPC optimised not Intel?
I suspect, optimised by Apple for both architectures. Nothing at
<http://lists.apple.com/mailman/listinfo/darwin-x86> to suggest otherwise. A
definitive answer may be somewhere around
William K. Volkman wrote:
> Last time I really analyzed these systems (2002) the PPC had about 8X the
> memory bandwidth capability of the Intel architecture. So I would expect a
> memory intensive application to run about 8X faster on that older
> architecture. … If you compare the memory performance of your circa 2002
> 2.0Ghz Intel Xeon processor you'll find it about 4X faster than the shiny
> new Core Duo you just bought. Marketing works.
As I'll soon get a new MacBook Pro, I took this opportunity to *really* push
the 2006 model that I currently use. Installed iLife '09 with a bare minimum
of free disk space, happily leaving myself with only 1.5 GB of 92.84 GB free
(around 1.5%, way below the 10% recommendations), happily knowing that swap
files may be highly fragmented in that limited space.
* with as little as 1 GB RAM on the 2005 PowerPC I can have reasonable start
times and excellent quit times
* throwing more RAM (3 GB) at the Intel in target disk mode can lead to
excellent start times
* with the Intel MacBook Pro at its 2 GB max, with six or more swap files
one of which is in more than one thousand fragments, with my Chandler
profile on a USB flash drive: I can have excellent start times.
After each restart of the OS: the first start of Chandler is predictably
slow, second and subsequent starts are faster.
Notes at <http://chandlerproject.org/Journal/GrahamPerrin20090222>.
Further discussion to follow, including but not limited to
Off-topic from Chandler: in recent months, I vaguely planned to add more RAM
to a 2003 dual processor PowerPC Xserve that I use for Plone. The other
option: a new Xserve.
William's comments re: PowerPC and memory helped me to prefer an upgrade to
the PowerPC, but then I discovered that this old Xserve is already at its 2
GB RAM max :(
http://support.apple.com/kb/SP102 Xserve (Slot Load) - Technical
Single Python process utilising multiple CPUs?
View this message in context: http://n2.nabble.com/Performance%3A-comparing-Intel-and-PowerPC-versions-of-Chandler-desktop-1.0.3-RC1-on-Mac-OS-X-10.5.6-tp2348910p2371063.html
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