Paul Boddie a écrit : > On 25 Jan, 14:05, Bruno Desthuilliers <bruno. > [EMAIL PROTECTED]> wrote: >> Christian Heimes a écrit : >> >>> No, that is not correct. Python code is compiled to Python byte code and >>> execute inside a virtual machine just like Java or C#. >> I'm surprised you've not been flamed to death by now - last time I >> happened to write a pretty similar thing, I got a couple nut case >> accusing me of being a liar trying to spread FUD about Java vs Python >> respective VMs inner working, and even some usually sensible regulars >> jumping in to label my saying as "misleading"... > > Well, it is important to make distinctions when people are wondering, > "If Python is 'so slow' and yet everyone tells me that the way it is > executed is 'just like Java', where does the difference in performance > come from?" Your responses seemed to focus more on waving that issue > away and leaving the whole topic in the realm of mystery. The result: > "Python is just like Java apparently, but it's slower and I don't know > why."
I'm afraid you didn't read the whole post : """ So while CPython may possibly be too slow for your application (it can indeed be somewhat slow for some tasks), the reasons are elsewhere (hint: how can a compiler safely optimize anything in a language so dynamic that even the class of an object can be changed at runtime ?) .""" I may agree this might not have been stated explicitily enough, but this was about JIT optimizing compilers. Also, a couple posts later - FWIW, to answer the OP "how does it comes it slower if it's similar to Java" question : """ Java's declarative static typing allow agressive just-in-time optimizations - which is not the case in Python due to it's higly dynamic nature. """ -- http://mail.python.org/mailman/listinfo/python-list
