On Fri, Oct 8, 2021 at 8:11 AM Guido van Rossum <gu...@python.org> wrote:
> To be clear, Sam’s basic approach is a bit slower for single-threaded > code, and he admits that. > Is it also slower even when running with PYTHONGIL=1? If it could be made the same speed for single-threaded code when running in GIL-enabled mode, that might be an easier intermediate target while still adding value. —Chris But to sweeten the pot he has also applied a bunch of unrelated speedups > that make it faster in general, so that overall it’s always a win. But > presumably we could upstream the latter easily, separately from the > GIL-freeing part. > > On Fri, Oct 8, 2021 at 07:42 Łukasz Langa <luk...@langa.pl> wrote: > >> >> > On 8 Oct 2021, at 10:13, Steven D'Aprano <st...@pearwood.info> wrote: >> > >> > Hi Sam, >> > >> > On Thu, Oct 07, 2021 at 03:52:56PM -0400, Sam Gross wrote: >> > >> >> I've been working on changes to CPython to allow it to run without the >> >> global interpreter lock. I'd like to share a working proof-of-concept >> that >> >> can run without the GIL. >> > >> > Getting Python to run without the GIL has never been a major problem for >> > CPython (and of course some other Python interpreters don't have a GIL >> > at all). >> >> On the first page of Sam's design overview he references Gilectomy by >> name. >> >> > Single threaded code is still, and always will be, an important part of >> > Python's ecosystem. A lot of people would be annoyed if the cost of >> > speeding up heavily threaded Python by a small percentage would be to >> > slow down single-threaded Python by a large percentage. >> >> Quoting that same design document, Sam writes: "The new interpreter >> (together with the GIL changes) is about 10% faster than CPython 3.9 >> on the single-threaded pyperformance benchmarks." >> >> - Ł >> _______________________________________________ >> Python-Dev mailing list -- python-dev@python.org >> To unsubscribe send an email to python-dev-le...@python.org >> https://mail.python.org/mailman3/lists/python-dev.python.org/ >> Message archived at >> https://mail.python.org/archives/list/python-dev@python.org/message/JO7OQCHZKIFNKSXTTXT2JBCF5H47M7OO/ >> Code of Conduct: http://python.org/psf/codeofconduct/ >> > -- > --Guido (mobile) > _______________________________________________ > Python-Dev mailing list -- python-dev@python.org > To unsubscribe send an email to python-dev-le...@python.org > https://mail.python.org/mailman3/lists/python-dev.python.org/ > Message archived at > https://mail.python.org/archives/list/python-dev@python.org/message/XQOOGKH5PIFBHJRK7W2LMX32DIGIH4KX/ > Code of Conduct: http://python.org/psf/codeofconduct/ >
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