2012/1/19 Vitja Makarov <vitja.maka...@gmail.com>: > 2012/1/19 Robert Bradshaw <rober...@math.washington.edu>: >> I think the right thing to do here is make all module-level globals >> into "cdef public" attributes, i.e. C globals with getters and setters >> for Python space. I'm not sure whether this would best be done by >> creating a custom dict or module subclass, but it would probably be >> cleaner and afford much more than a 1.6x speedup. >> >> - Robert >> >> On Wed, Jan 18, 2012 at 12:30 PM, Vitja Makarov <vitja.maka...@gmail.com> >> wrote: >>> I tried to optimize module lookups (__pyx_m) by caching internal PyDict >>> state. >>> >>> In this example bar() is 1.6 time faster (500us against 842us): >>> >>> C = 123 >>> def foo(a): >>> return C * adef bar(): >>> for i in range(10000): foo(i) >>> Here is proof of >>> concept:https://github.com/vitek/cython/commit/1d134fe54a74e6fc6d39d09973db499680b2a8d9 >>> >>> So the question is: does it worth it? >>> > > Yes, nice idea. > It's possible to subclass PyModuleObject and I didn't find any use of > PyModule_CheckExact() in CPython's sources: > > import types > import sys > > global_foo = 1234 > > class CustomModule(types.ModuleType): > def __init__(self, name): > types.ModuleType.__init__(self, name) > sys.modules[name] = self > > @property > def foo(self): > return global_foo > > @foo.setter > def foo(self, value): > global global_foo > global_foo = value > > CustomModule('foo') > > import foo > print foo.foo >
But this seems to break globals(). -- vitja. _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
