[Python-Dev] are NULL checks in Objects/abstract.c really
Thu, 13 Mar 2003 13:45:45 +0000
Michal Vitecek <email@example.com> writes:
> i had a quick look at Objects/abstract.c in 2.2.2's source. almost
> every function there checks whether the objects it's passed are not
> NULL. if they are, SystemError exception occurs. since i've never come
> across such exception i've commented out those checks.
There are a number of bits of stupidly defensive programming in
Python... personally, I'd like to see the back of them.
> the resulting python binary did 6.5% more pystones on average (the
> numbers are below).
Wow! Can we persuade you to try CVS HEAD?
> my question is: are those checks really necessary
> in non-debug python build?
This is the tricky bit, of course. I don't think so, but it's hard to
OTOH, it could be the easiest 5% speed up ever...
This makes it possible to pass complex object hierarchies to
a C coder who thinks computer science has made no worthwhile
advancements since the invention of the pointer.
-- Gordon McMillan, 30 Jul 1998