I'm playing with the cffi embedding interface. I dusted off the uwsgi pypy plugin and began porting it to the new interface. I'm very impressed at how little C is required to make it work.
The Python code embedded in the module, that attaches Python functions to uwsgi's plugin interface with @ffi.def_extern(), could be replaced with "import <module passed as uwsgi argument>" and you could iterate on this without (the 1-second of) recompiling each time. A suitably motivated person could build an ASGI server this way. Need to look up how to initialize virtualenv at the Python level. I had more success with pypy 7.1.1 which seemed to be finding the virtualenv based on the working directory. Currently pypy 7.3.1 is having trouble finding the os module in pypy_init_home. And this patch https://foss.heptapod.net/pypy/cffi/issues/450 is needed to get rid of a warning. When it works the cool demo would be to compile suffixed variants of the plugin for pypy and cpython, having one uwsgi emperor mange servers in both languages. It's at https://github.com/unbit/uwsgi/pull/2146/files Cheers, Daniel Holth
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