On Sat, Aug 26, 2017 at 12:21:44PM -0400, Yury Selivanov wrote: > On Sat, Aug 26, 2017 at 7:45 AM, Stefan Krah <ste...@bytereef.org> wrote: > >> This generic caching approach is similar to what the current C > >> implementation of ``decimal`` does to cache the the current decimal > >> context, and has similar performance characteristics. > > > > I think it'll work, but can we agree on hard numbers like max 2% slowdown > > for the non-threaded case and 4% for applications that only use threads? > > I'd be *very* surprised if wee see any noticeable slowdown at all. The > way ContextVars will implement caching is very similar to the trick > you use now.
I'd also be surprised, but what do we do if the PEP is accepted and for some yet unknown reason the implementation turns out to be 12-15% slower? The slowdown related to the module-state/heap-type PEPs wasn't immediately obvious either; it would be nice to have actual figures before the PEP is accepted. Stefan Krah _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
