Isn't it funny, by the way, that people don't go around talking about how slow Jython is? At least, I haven't seen it to the extent that I've seen with CPython.
People talk about how slow CPython is, is because they are writing code targeted for it that traditionally would have been written in C. Python *is* slower than C. You can try to deny it, but it is simple fact. However, python is a really nice language to program in. So people use it anyways. It is "fast enough" for many things.
Nobody talks about how slow Jython is, because nobody(1) is writing entire programs in it. Jython is used as a way to script Java programs, and as such, it is pretty much completely unimportant how fast it runs.
Java has also traditionally got a lot of bad press for its lack of speed, and it was usually of the "not fast enough" variety, which is much worse than what's said of Python. However, a huge amount of progress has been made and Java really is quite speedy these days. It was not PR that made it faster, but hard work on the part of Sun.
There is currently a lot of work going on in the python community to make Python faster, which indicates both that Python is too slow for some people, and that it will be faster in the future. This is a good thing, and not something that should be shoved under the rug to try to pretend python is ultra mega super fast already.
James
1) Of course someone probably is, but you get the idea.
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