site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On May 14, 2005, at 4:57 PM, Justin Walker wrote: _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... What you are experiencing is, I think, due to the small size of memory. I think (although I've not been motivated to track this down) that there is more paging going on now, possibly because apps and frameworks are bigger. However, I have to say, once an app is up front and in control, my overworked Pismo feels way snappier than earlier versions of Mac OS X. As confirmation of the RAM theory, I offer the fact that my PowerBook G4 (with 1.5GB RAM) feels faster just about everywhere under 10.4 than 10.3, not just when one app is in front and stays there. I have not yet observed 10.4 to do any paging on this machine. 10.3 would page things out occasionally, even though it didn't really need to with this much RAM. Probably 10.4's VM system is better at reclaiming buffer cache pages when under memory pressure, or something like that. (There, I've mentioned part of the Darwin kernel to help keep this on topic. :) This email sent to site_archiver@lists.apple.com