Hi The python code that's generated is ok, but the problem is that everything is very dynamic. If you want this to work fast on PyPy, it should really generate

Hi The python code that's generated is ok, but the problem is that everything is very dynamic. If you want this to work fast on PyPy, it should really generate a bunch of getters and setters that use attribute access and not go through generic __getattr__ that does some dictionary lookups. Additionally a lot of code is written in a way that creates a lot of temporary lists iterating over all fields and double checking stuff - this is bound to be way slower than a simple C/Java stuff that does the very simplest "check type - attribute access" sort of stuff.