The system that's faster with Pypy is a AMD FX(tm)-4300 Quad-Core Processor.
The system that's faster with CPython+Cython is a AMD Athlon(tm) II X3 455 Processor. On Sat, May 1, 2021 at 3:08 PM Emre Yavuz <emre.yavuz...@gmail.com> wrote: > That’s really interesting! I also started to think it’s slower in I/O, I > also run my tests in Ubuntu and Debian which resulted same. > > What type of system runs PyPy faster? > > Did you or someone have experience that and chance to look what’s making > it slower? Because difference is huge when it comes to sys calls. > > I am planning to dive into the code to find out more if it’s not a known > fact > > Best, > Emre Yavuz > > On 1 May 2021, at 22:55, Dan Stromberg <strom...@gmail.com> wrote: > > > I have a system call-heavy program ( > https://stromberg.dnsalias.org/~strombrg/backshift/), that is faster with > pypy on one machine, and faster with CPython+Cython on another. Same code, > different machines, different relative speeds for the two implementations. > > For a long time, I thought pypy was just faster at CPU and slower at I/O, > but it turns out that's not always true. > > HTH. > > On Sat, May 1, 2021 at 1:50 PM Emre Yavuz <emre.yavuz...@gmail.com> wrote: > >> Hello, >> >> Today I was doing some experiment with CPython and PyPy. I was very >> impressed by the performance of PyPy, when it’s doing operations in user >> space, it was almost 20 times faster than CPython. >> >> Then I decided to switch our Python CLI to PyPy and I run one of our >> major command in our CLI and results were worse than CPython. It got >> slower! Then I started to research it more. Our CLI’s characteristic is >> that it calls multiple other programs and read a lot of configuration data >> and create many files which mean all of those operations were related to >> sys calls. >> >> Then I run some simple test cases, tried to read and write millions of >> lines to a file or create and kill multiple processes. All of these >> operations were almost 5 times slower than CPython. I run my tests both >> MacOS and RHEL with latest version of PyPy3.7 >> >> My question is that, is that something known? Or can it be some >> improvement area that can be contributed? >> >> Best, >> Emre Yavuz >> _______________________________________________ >> pypy-dev mailing list >> pypy-dev@python.org >> https://mail.python.org/mailman/listinfo/pypy-dev >> > > > -- > Dan Stromberg > > > -- Dan Stromberg
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