On Thu, Dec 5, 2019 at 6:23 PM Mark Shannon <mark@hotpy.org> wrote:

On 05/12/2019 12:45 pm, Karthikeyan wrote:
> On Thu, Dec 5, 2019, 5:53 PM Mark Shannon <mark@hotpy.org
> <mailto:mark@hotpy.org>> wrote:
>
>
>
> On 04/12/2019 2:31 am, Gregory P. Smith wrote:
> >
> >
> > On Tue, Dec 3, 2019 at 8:21 AM Mark Shannon <mark@hotpy.org
> <mailto:mark@hotpy.org>
> > <mailto:mark@hotpy.org <mailto:mark@hotpy.org>>> wrote:
> >
> > Hi Everyone,
> >
> > I am proposing a new PEP, still in draft form, to impose a
> limit of one
> > million on various aspects of Python programs, such as the
> lines of
> > code
> > per module.
> >
> > Any thoughts or feedback?
> >
>
> [snip]
>
> >
> >
> > Overall I /like/ the idea of limits... /But.../ in my experience,
> limits
> > like this tend to impact generated source code or generated
> bytecode,
> > and thus any program that transitively uses those.
> >
> > Hard limits within the Javaish world have been *a major pain* on the
> > Android platform for example. I wouldn't call workarounds
> > straightforward when it comes to total number of classes or
> methods in a
> > process.
>
> Do you have any numbers? 1M is a lot bigger then 64K, but real world
> numbers would be helpful.
>
>
> I guess the relevant case in question is with Facebook patching the
> limit of 65,000 classes in Android :
> https://m.facebook.com/notes/facebook-engineering/under-the-hood-dalvik-patch-for-facebook-for-android/10151345597798920

Is that the correct link? That seems to be an issue with an internal
buffer size, not the limit on the number of classes.

Sorry, it should have been about the number of methods limit in Android that is around 65,000 methods : https://developer.android.com/studio/build/multidex . I guess facebook worked around the limit but couldn't find a reliable source for it. There was also a post on Facebook iOS app with large number of classes but not essentially hitting a limit on the iOS platform : https://quellish.tumblr.com/post/126712999812/how-on-earth-the-facebook-ios-application-is-so . I guess it's the number referred but I could be mistaken.

>
> >
> > If we're to adopt limits where there were previously none, we
> need to do
> > it via a multi-release deprecation cycle feedback loop to give
> people a
> > way to find report use cases that exceed the limits in real world
> > practical applications. So the limits can be reconsidered or the
> > recommended workarounds tested and agreed upon.
> >
> > -gps
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Regards,

Karthikeyan S