Hi Tom, My immediate reaction is No, for three reasons:
1. My experience has been that Cython isn’t especially stable. Admittedly, I haven’t looked at it for a couple of years, but when I did, I ended up getting caught in some really nasty bugs that came back and forth between micro versions. 2. Even if Cython *was* stable: The execution speed of your Django stack is almost certainly *not* the bottleneck of your application. Query time, database transfer time, and just basic client-end connection latency will, for most applications, be a *much* bigger performance problem than the execution time of the Python stack. 3. Even if the Django code in your app *was* your bottleneck, switching to PyPy as your interpreter will almost certainly give you better performance for less engineering effort. If you want to do some experimentation, by all means go right ahead; however, I would caution you that any patch you produce will need to demonstrate a *significant* improvement in real-world use cases for us to adopt the engineering overhead of integrating Cython into Django’s runtime environment. Yours Russ Magee %-) On 21 May 2017, 2:59 PM -0700, Tom Forbes <t...@tomforb.es>, wrote: > Hello, > There was a very interesting talk at Pycon about using Cython to speed up > hotspots in Python programs: > > https://www.youtube.com/watch?v=_1MSX7V28Po > > It got me wondering about possibly using Cython in selected places within > Django. I realize since Django was first released the distribution situation > was a bit more wild-west, resulting in part to Django not relying on any > third party dependencies. But that situation is rapidly changing (see > https://github.com/django/deps/blob/master/draft/0007-dependency-policy.rst#background-and-motivation) > and with these changes could it also be a time to investigate Cython usage > for select parts of Django? > > Several popular projects use Cython 'speedup' modules with pure-python > fallbacks with great success, for example aiohttp > (https://github.com/aio-libs/aiohttp/blob/master/setup.py#L20). I did some > quick and dirty profiling of the 'django.utils.html.escape' function and > found that by simply including Cython as part of the build, and with no > syntax changes, the function executes twice as fast. > > There are lots of considerations to take into account (like ensuring the > Cython functions are in sync with the fallback ones), but it seems that it > could make a big difference with small, self contained functions (like > html.escape or html.escapejs) that are executed frequently as part of a > request. Other functions that might be worth looking at include > core.http.mutliparser.parse_header or utils.baseconv.BaseConverter.convert. > > My question is: this this something that's worth exploring, or is it outside > of the realms of possibility? > -- > You received this message because you are subscribed to the Google Groups > "Django developers (Contributions to Django itself)" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-developers+unsubscr...@googlegroups.com. > To post to this group, send email to django-developers@googlegroups.com. > Visit this group at https://groups.google.com/group/django-developers. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-developers/CAFNZOJOsAdL422Ntj4cUkYF1bjqUBdMAXp33xZ%3DapSwqXMasvA%40mail.gmail.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-developers+unsubscr...@googlegroups.com. To post to this group, send email to django-developers@googlegroups.com. Visit this group at https://groups.google.com/group/django-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/0c83b001-6654-4c6d-a134-e5dd7a6b8dc8%40Spark. For more options, visit https://groups.google.com/d/optout.
