Hello,
Yesterday Neil Schemenauer mentioned some work that a colleague of mine
(CCed) and I have done to improve CPython start-up time. Given the recent
discussion, it seems timely to discuss what we are doing and whether it is
of interest to other people hacking on the CPython runtime.
There ar
On Fri, May 4, 2018 at 5:14 AM, Nick Coghlan wrote:
> This definitely seems interesting, but is it something you'd be seeing us
> being able to take advantage of for conventional Python installations, or
> is it more something you'd expect to be useful for purpose-built
> interpreter instances? (
On Fri, May 4, 2018 at 6:58 PM, Nathaniel Smith wrote:
> What are the obstacles to including "preloaded" objects in regular .pyc
> files, so that everyone can take advantage of this without rebuilding the
> interpreter?
>
The system we have developed can create a shared object file for each
comp
On Sun, Sep 16, 2018 at 1:24 PM, Antoine Pitrou wrote:
> I think it's of limited interest if it only helps with modules used
> during the startup sequence, not arbitrary stdlib or third-party
> modules.
>
This should help any use-case that is already using the freeze module
already bundled with
On Tue, Sep 18, 2018 at 1:31 AM, Antoine Pitrou wrote:
> No idea. In my previous experiments with module import speed, I
> concluded that executing module bytecode generally was the dominating
> contributor, but that doesn't mean loading bytecode is costless.
>
My observations might not be so d
On Tue, Sep 18, 2018 at 5:55 AM, Fabio Zadrozny wrote:
> During the import process, Python can already deal with folders and .zip
> files in sys.path... now, instead of having special handling for a new
> concept with a custom command line, etc, why not just say that this is a
> special file (e.g
On Tue, Sep 18, 2018 at 11:38 AM, Steve Dower
wrote:
> The primary benefit of the importlib hook approach is that it would not
> require rebuilding CPython each time you make a change. Since we need to
> consider a wide range of users across a wide range of platforms, having the
> ability to load
On Wed, Sep 19, 2018 at 12:32 AM, Stefan Behnel wrote:
> Also, one thing that would be interesting to find out is whether constant
> Python data structures can actually be pre-allocated in the data segment
> (and I mean their object structs) . Then things like tuples of strings
> (argument lists
On Tue, Sep 18, 2018 at 3:00 PM, Neil Schemenauer
wrote:
> The users of Python are pretty diverse so it depends on who you ask.
> Some would like a giant executable that includes everything they
> need (so of like the Go approach). Other people want an executable
> that has just importlib inside
On Thu, Sep 20, 2018 at 11:20 PM, Stefan Behnel wrote:
> What about the small integers cache? The C serialisation generates several
> PyLong objects that would normally reside in the cache. Is this handled
> somewhere? I guess the cache could entirely be loaded from the data
> segment. And the sa
On Tue, Apr 21, 2020 at 7:33 AM Victor Stinner wrote:
> IMHO it's worth it to explore the subinterpreters approach. I don't
> think that it's going to be a major maintenance burden: the code is
> already written and tests. The PEP is only about adding a public
> Python API.
While this PEP may not
Thank you very much for putting this PEP together.
It would be very helpful to broaden the objective of avoiding functions
returning PyObject** to other types of pointers. I have in mind several
functions in the C-API that return a char* pointer to the contents of an
object. While these function
On Tue, Jun 23, 2020 at 7:52 AM Stefan Behnel wrote:
> I agree that this is more explicit when it comes to resource management,
> but there is nothing that beats direct native data structure access when it
> comes to speed.
>From the perspective of the function that wants to get access to the
c
On Sun, Jul 19, 2020 at 1:34 PM Thomas Moreau
wrote:
> While it would be nice to have simpler identifiers for objects, it would
> be hard to make it work for multiprocessing, as objects in different
> interpreter would end up having the same repr. Shared objects (locks) might
> also have differen
On Tue, Jul 21, 2020 at 11:46 AM Mark Shannon wrote:
> On 18/07/2020 9:20 am, Inada Naoki wrote:
> > And I am worrying precise tracing blocks future advanced bytecode
> optimization.
> > Can we omit precise tracing and line number information when
> > optimization (`-O`) is enabled?
>
> I don't t
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