RE: [WinMac] Re: Rule of thumb

From: Leonard Rosenthol (leonardr[at]lazerware.com)
Date: Sat Dec 30 2000 - 15:38:15 PST

  • Next message: Mark Workman: "[WinMac] Re: Re: Rule of thumb"

    At 4:11 PM -0500 12/29/00, Dan Schwartz wrote:
    >Go back to the November 1995 (?Nov. 1994?) MacWorld magazine issue for an
    >excellent cover story description on the how's & why's of Photoshop memory
    >management.

            And you believe that NOTHING has changed in Photoshop since
    1995? What are you smoking, and why aren't you sharing it??

            (and let us not forget that I've written code for Photoshop -
    so I think I have a BIT more knowledge of the internals of PS than
    you do ;).

    >In a nutshell, as long as the uncompressed image - And the first Undo - is in
    >RAM, then you don't have to hit the scratch disk at all. Virtual memory
    >management - No matter how sophisticated! - only comes into play when you run
    >out of free RAM on the Mac. As you drop from 3x down to 2.5x in free RAM, the
    >speed drops off slightly.

            Again, you are talking about the VM used by the OS - NOT by
    the applications in question. Photoshop does NOT use the OS's local
    VM - either Mac OS OR Windows!

    Leonard 

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