10.04.18 20:38, Chris Angelico пише:
On Wed, Apr 11, 2018 at 2:14 AM, Serhiy Storchaka <storch...@gmail.com> wrote:
A deployed Python distribution generally has .pyc files for all of the
standard library. I don't think people want to lose the ability to
call help(), and unless I'm misunderstanding, that requires
docstrings. So this will mean twice as many files and twice as many
file-open calls to import from the standard library. What will be the
impact on startup time?
Yes, this will mean more syscalls when import with docstrings. But the
startup time doesn't matter for interactive shell in which you call
help(). It was expected that programs which need to gain the benefit
from separating optional components will run without loading them (like
with option -OO).
The overhead can be reduced by packing multiple files in a single archive.
Finally, loading docstrings and other optional components can be made
lazy. This was not in my original idea, and this will significantly
complicate the implementation, but in principle it is possible. This
will require larger changes in the marshal format and bytecode. This can
open a door for further enhancements: loading the code and building
classes and other complex data (especially heavy namedtuples, enums and
dataclasses) on demand. Often you need to use just a single attribute or
function from a large module. But this is different change, out of scope
of this topic.
_______________________________________________
Python-ideas mailing list
Python-ideas@python.org
https://mail.python.org/mailman/listinfo/python-ideas
Code of Conduct: http://python.org/psf/codeofconduct/
