Charming Python: Pyrex extends and speeds Python apps The author takes a stab at speeding up his pure-Python version of hashcash using Pyrex, a language for writing Python extension modules that lets you avoid having to use C for the job. He contrasts writing code in Pyrex -- generally for use with larger Python applications -- with speeding up Python applications using the Psyco compiler, which he has written about previously on developerWorks. with authorprogrammingpure-pythonpythonspeedingstabtakesversion