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"Topaz is written in Python on top of the RPython translation toolchain (the same one that powers PyPy)." [1]

"Topaz - An implementation of the Ruby programming language, in Python, using the RPython VM toolchain." [2]

[1] http://docs.topazruby.com/en/latest/blog/announcing-topaz/ [2] https://github.com/topazproject/topaz/blob/master/README.rst




As RPython is a subset of Python, that statement is technically correct but misleading. Stating that Topaz is "Ruby written in Python" leads to the idea that it's written in / runs on CPython, which is really not the case.


Well, it can be run on CPython if you wanted (that's how we run many of our tests). It's just crazy slow.




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