Re: Ready for Guile 2.2!

[Ludovic Courtès]

Maxim Cournoyer <address@hidden> skribis:

> Andy Wingo <address@hidden> writes:
>
>> On Thu 20 Apr 2017 14:35, address@hidden (Ludovic Courtès) writes:
>>
>>> address@hidden (Ludovic Courtès) skribis:
>>>
>>>> ;; 2.724686s real time, 3.117062s run time.  0.880827s spent in GC.
>>>> scheme@(guile-user)> (version)
>>>> $1 = "2.0.13"
>>>>
>>> scheme@(guile-user)> ,use(guix scripts build)
>>> scheme@(guile-user)> ,time (guix-build "libreoffice" "certbot" "xmonad" 
>>> "-n" "--no-substitutes" "--no-build-hook")
>>>
>>> [...]
>>>
>>> ;; 1.826528s real time, 1.994426s run time.  0.382750s spent in GC.
>>> scheme@(guile-user)> (version)
>>> $1 = "2.2.1"
>>>
>>> That’s a 33% speedup compared to 2.0.
>>
>> That is a 50% speedup compared to 2.0 :)  If we consider its speed as
>> being how many times you could do this per second, then 2.0 speed is
>> 1/2.72, and 2.2.1 speed is 1/1.82.  Speed ratio is then
>> 2.72/1.82=1.4945.  So 2.2.1 is 1.5x the speed of 2.0, or 50% faster :)
>>
>> Andy, who is not looking for praise, but who likes perf numbers :)
>
> Impressive :). Is there a blog post/article/information somewhere about
> what went in Guile to make it that faster?

I highly recommend posts from the last couple of years (or more!) at
<http://wingolog.org>.  :-)

<http://wingolog.org/archives/2017/03/15/guile-2-2-omg> has pointers to
the most important bits.

Ludo’.