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python on the smalltalk VM
Carlos Ribeirocribeiro at mail.inet.com.br
Thu Apr 19 23:24:40 EDT 2001
At 23:03 19/04/01 +0100, Michael Hudson wrote:>Douglas Alan <nessus at mit.edu> writes:>> > After many years of research, they came up with a compiler for Self> > that would generate code that runs about one half to one third the> > speed of compiled C code. This is 30 to 50 times faster than> > Python.>>No it isn't. At least, not for me. Generally I find that fairly>optimized C modules are about 40-60 times faster than really optimized>Python (I'm better at Python than C). Obviously "it depends", but>I've found these numbers to be fairly consistent over a variety of>tasks.For all reasonable applications that I can think of, 30-50 compared to 40-60 is about the same (at least is the same order of magnitude). What is not clear to me if Doug's number is Python x C or Python x "optimized Self".Anyway, what really surprises me is the magnitude of the difference between C and Python. It does make sense to have a big difference - interpreted languages will always be slower - but the higher level of abstraction in Python should allow for a smaller difference. It brings the question: how are these numbers measured? For some applications (such as text file processing) I doubt that the difference could be so big, specially if you know how to optimize your Python code.Carlos Ribeiro
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