site_archiver@lists.apple.com Delivered-To: cocoa-dev@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=LPPMxbr2eIcNC90EYvTzbPcXsotRvkdP9jUWyDaGVx8=; b=Lz/7BMNlHCsrxRzG0dSvPPniht8oGdRa3kmqoxC7CuZwKvFeoVBkXi8QmzqSxBzEHn RrmczrvH77oG8OSk12DZfHzRSLJ/72MenmB9tWEHQG1t+JD1kGFWDO2SJR/D9n5s8KDa /x5zCs/y1nGY2gJ6Pl+ex2FF8X5buAAAGDq5QNFhRHz0z2qovGMhSL+JLEW7UVJfUkDl 54AULfSDul1CdCWFk/3kxSXbxEoWU6VuRy5uB/Nw7szGuPRT3LOZHEjrE8UusYBDp76Y xjVBaJsJ1WtOhBERbmlU814e2AE6UN9/GOpWib4BOVpKLEQiBx9aCb62Hv/NGpnnXlcp frAg== Thanks for all the advice. I set up the 4GB RAM disk, verified it was putting Derived Data there, and tested against a dynamic framework I build often. I even rebooted to have a clean starting point. The results were not great. The framework normally takes between 13 and 17 seconds to build, and the first try with the RAM disk took 19. After that it recorded some lower times, but essentially a minor improvement, if at all. A little surprising. Anyway, determined to stick with the 2013 machine for a while longer, it's still "good enough." On Fri, Jun 28, 2019 at 4:58 PM Jeff Szuhay <jeff@szuhay.org> wrote:

Compilation is largely an i/o-bound problem. Unless the projects you work on are hideously large and would benefit from parallel processing (splitting the i/o among several processors), your current machine is quite satisfactory.

Try this: using your current system, create a 4GB disk partition in memory. Then make that partition the “Derived Data” location.

You can see how here: [ http://www.blinddogsoftware.com/goodies/#CacheInYourPocket]

If you notice an improvement in stability and decreased build time, great. If not, just keep on building great apps.

On Jun 28, 2019, at 11:02 AM, Steve Mykytyn via Cocoa-dev < cocoa-dev@lists.apple.com> wrote:

My main Xcode machine is a late 2013 27-inch iMac, 24GB RAM, 3.5 GHz Core i7 with 500GB SSD.

It works fine, but I'm wondering if an iMac Pro or a top-of-the-line 2019 iMac would be a life-changing experience. Or just, "that's nice."

The Geekbench numbers are somewhat informative, but hoping for commentary based on personal, direct experience.

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