[RELEASE] Python 3.9.0b1 is now available for testing

[Joseph Jenne]

>
> I used https://github.com/python/pyperformance pyperformance to 
> compare Arch linux latest
>
>> Python 3.8.3 (default, May 17 2020, 18:15:42) [GCC 10.1.0] on linux
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>
>
> against a vanilla build (configure make makeinstall) of python 3.9b1
>
>> Python 3.9.0b1 (default, May 19 2020, 21:09:14) [GCC 10.1.0] on linux
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>
>
> I find all the bench marks seem to be slower in python 3.9b1.
>
>> 38.json
>> =======
>>
>> Performance version: 1.0.1
>> Report on Linux-5.6.14-arch1-1-x86_64-with-glibc2.2.5
>> Number of logical CPUs: 4
>> Start date: 2020-05-31 04:00:24.503704
>> End date: 2020-05-31 04:22:44.961331
>>
>> 39.json
>> =======
>>
>> Performance version: 1.0.1
>> Report on Linux-5.6.14-arch1-1-x86_64-with-glibc2.31
>> Number of logical CPUs: 4
>> Start date: 2020-05-31 04:23:21.247268
>> End date: 2020-05-31 04:49:09.891889
>>
>> ### 2to3 ###
>> Mean +- std dev: 437 ms +- 5 ms -> 548 ms +- 7 ms: 1.25x slower
>> Significant (t=-96.22)
>>
>> ### chameleon ###
>> Mean +- std dev: 12.5 ms +- 0.1 ms -> 16.2 ms +- 0.2 ms: 1.30x slower
>> Significant (t=-111.53)
> > .......
>
> Is this because I haven't built in the same way as Arch or are there 
> real slowdowns in this beta? Or even dumber have I got the results the 
> wrong way round?
> -- 
> Robin Becker

Most builds of python included with distribution packages are built with 
various levels of optimization. I have experienced slowdowns from source 
built python of the same version as the distribution python even when 
using some optimization flags with the configure script. This appears to 
be normal behavior and is not cause for concern about the performance of 
python 3.9.0b1

--

Joseph Jenne