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From: Alexander Kanavin <alexander.kanavin@linux.intel.com>
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Date: Thu, 1 Jun 2017 20:37:41 +0300
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Subject: Re: [PATCH 0/2] Multi-threaded RPM support
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On 06/01/2017 08:13 PM, Mark Hatle wrote:
>>> perl
>>> before: 1m19s 63M
>>> after: 55s 42M
>>>
>>> python3
>>> before: 40s 38M
>>> after: 28s 24M
>>
>> it is interesting to see that perl and python does not benefit 'much'.
>> buildstats should give us a better picture per recipe.
>
> This may be due to how we process rpmdeps within OpenEmbedded.. but I'm not
> sure.  I'd have expected a bigger time difference with large packages (lots of
> sub packages) like perl and python3.

The numbers include the overhead of starting bitbake (some 10 seconds). 
Subtract that (from both 'before' and 'after') and then it's more 
impressive :) I tested via

time bitbake -f -c do_package_write_rpm perl

Alex