Armin,
If the newly-named '_cppyy' module is more minimal than '_cffi_backend'
'more minimal' is a hard to define term, but a 'wc -l' shows that _cffi_backend has 8498 lines of python and _cppyy has 4265. Of course, the latter uses the former, saving lots of code for it. :) Further, _cppyy includes 470 lines in pythonify.py which could move out, as it is not RPython, but that would make it harder to write tests, which would have to be low-level (as in test_cppyy.py) instead of high level (the rest). I wrote some small benchmarks for the PyHPC '16 paper. If I find the time to flesh that out further, I can better judge what can move out of RPython (_cppyy) and into Python (cppyy), without loss of performance. Best regards, Wim -- WLavrijsen@lbl.gov -- +1 (510) 486 6411 -- www.lavrijsen.net