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| From: | Bob Friesenhahn |
| Subject: | Re: [Automake-NG] [PATCH 1/2] [ng] perf: disable GNU make builtin rules, for performance reasons |
| Date: | Wed, 27 Jun 2012 12:30:36 -0500 (CDT) |
| User-agent: | Alpine 2.01 (GSO 1266 2009-07-14) |
On Wed, 27 Jun 2012, Stefano Lattarini wrote:
* lib/am/header-vars (MAKEFLAGS): Append '--no-builtin-rules'. This enhance performance by removing GNU make builtin rules that would be rather irrelevant (e.g., rules to automatically check out files from from RCS or SCCS repositories), or overridden by Automake (e.g., rules to compile C or C++ files). With this simple tweak, the null-build time on GNU coreutils on an aging Debian system goes down from ~ 20 seconds to ~ 9 seconds.
This simple approach seems like a huge improvement. The improvement will surely be larger if some/all of the files are accessed over a network.
Bob -- Bob Friesenhahn address@hidden, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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