Off-list, someone wrote:
> … not many other apps are built almost exclusively in python. > Good point. 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 <http://www.opensource.apple.com/darwinsource/10.5.6/python-30.1.2/> or <http://developer.apple.com/opensource/>. 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. > > HTH, > William. > Interesting. 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. In brief: * 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 /.hotfiles.btree --- 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 Specifications http://n2.nabble.com/Single-Python-process-utilising-multiple-CPUs--tp334637p334637.html Single Python process utilising multiple CPUs? http://n2.nabble.com/Python-multiprocessor-tp340024p340030.html Python multiprocessor Regards Graham -- 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 Sent from the Chandler users mailing list archive at Nabble.com. _______________________________________________ [email protected] mailing list unsubscribe here: http://lists.osafoundation.org/mailman/listinfo/chandler-users Chandler wiki: http://chandlerproject.org/wikihome
