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From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Building CPython
Date: Thu, 14 May 2015 14:50:43 -0400
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On 5/14/2015 1:11 PM, Chris Angelico wrote:

> 2) make test - run the entire test suite. Takes just as long every
> time, but most of it won't have changed.

The test runner has an option, -jn, to run tests in n processes instead 
of just 1.  On my 6 core pentium, -j5 cuts time to almost exactly 1/5th 
of otherwise.  -j10 seems faster but have not times it.  I suspect that 
'make test' does not use -j option.


-- 
Terry Jan Reedy