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How Do Parallel Builds Scale?

From: Bob Friesenhahn
Subject: How Do Parallel Builds Scale?
Date: Sat, 17 Nov 2012 11:30:24 -0600 (CST)
User-agent: Alpine 2.01 (GSO 1266 2009-07-14)

I suspect that this anaysis has been mentioned on the Automake list before but (if so) it is worth looking at again. It seems that few packages benefit significantly from parallel builds. Many packages use Automake, but they use it in a very inefficient way. Here is a web page which shows the current pitiful state of parallel builds:

Given that even desktop and laptop computers support 4 CPU cores and that affordable server type hardware is available with as many as 64 CPU cores, it is useful if the build process of packages is redone so that it benefits from compilation on modern hardware.

Bob Friesenhahn
GraphicsMagick Maintainer,

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