Louis Huemiller <lhuem...@gmail.com> added the comment:
Reinstalled the server I'd been using for this issue, with Ubuntu 18.04.3 LTS Server amd64. This installation already came with Python3.6.8. Downloaded and installed Python3.7.3 and 3.8.0 from: https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz https://www.python.org/ftp/python/3.8.0/Python-3.8.0.tgz The installation process was somewhat complicated, with several to be discovered prerequisites. Used "apt install" to install the following needed dependencies: build-essential checkinstall libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev zlib1g-dev libffi-dev Then was able to do the following to build and install the downloaded Python3.7.3 and 3.8.0: $ sudo ./configure --enable-optimizations $ sudo -H make altinstall Then downloaded a clone of my magiccube2x2 repository and obtained the following results: $ python3.6 ./permutations2x2 --max_depth 6 | egrep "^# Total_Time:" # Total_Time: 69.02 $ python3.7 ./permutations2x2 --max_depth 6 | egrep "^# Total_Time:" # Total_Time: 84.52 $ python3.8 ./permutations2x2 --max_depth 6 | egrep "^# Total_Time:" # Total_Time: 83.14 In this case the runtimes under both of the Python versions that I downloaded the source for and built are significantly slower than the run with python3.6, which came already as part of Ubuntu 18.04.3. Instead of using the version of python3.7.3 that I built, was able to do: $ sudo apt install python3.7 to get one that had already been built for Ubuntu. Doing this allowed the following result: $ /usr/bin/python3.7 ./permutations2x2 --max_depth 6 \ | egrep "^# Total_Time:" # Total_Time: 62.39 Which is better than even the Python3.6 result. Unfortunately, there is not currently a pre-built Ubuntu package for Python3.8 and the one from ppa:deadsnakes/ppa, I already know has the performance issue. I did some searching on wiki.python.org and I was unable to find any instructions for how to build python from the source. Perhaps the instructions are already there but I was unable to find them. Perhaps this issue should be re-opened as a documentation error. I could really use instructions on how to built a performance version of Python and I suspect several others could also use this. For example, I'd like to pass that information to the maintainers of the deadsnakes repository. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38477> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
