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Man, PyPy got destroyed, let alone CPython! As a Python lover, that's pretty disheartening. I'm not an expert in many of these languages, but it would seem as t

Man, PyPy got destroyed, let alone CPython! As a Python lover, that's pretty disheartening. I'm not an expert in many of these languages, but it would seem as though it should be possible to build a Python interpreter as fast as V8, even without using Numpy to accelerate the math. Anybody have any thoughts as to why PyPy is such a poor performer here?

RivieraKid 14y ago
Python just 8x slower than C and 4x slower than Java? That's actually pretty good result for Python.
cdavid 14y ago
I think LuaJIT is the outlier, not python. All other implementations got lots of resources to make them fast, except for LuaJIT.
- copx 14y ago
  PyPy simply isn't at the same level as V8 and LuaJIT yet. V8 is a professional, full-time project employing some of the best programmers money can buy. And LuaJIT.. well LuaJIT is written by a fucking genius 10x programmer. Let me quote him: " The reason why X is slow, is because X's implementation is slow, unoptimized or untuned. Language design just influences how hard it is to make up for it. There are no excuses. " Source: http://www.reddit.com/user/mikemike http://www.reddit.com/user/mikemike (that's his reddit account) Python (and Ruby for that matter) could reach a comparable performance level if people with the necessary skills invested the necessary amount of effort.
  - cdavid 14y ago
    Indeed, that's what I meant, even though my phrasing was unclear. Thanks for clarifying.
Symmetry 14y ago
That's actually an impressively good result. All that wonderful expressive power that Python has comes at a price in implementation complexity, and there are a lot of different cases that the JIT needs to handle with Python. Lua, by contrast, is pretty much Scheme in ALGOL's clothing and is ridiculously simple inside.
jayflux 14y ago
Python is a High Level language, it was never designed with the intention of being as fast as C or Java or other lower level languages. As someone else pointed out the V8 has had a lot of backing and full time development, where as pypy, Cpython hasn't had as much. Pypy is still showing massive improvements despite being the slowest on that list.

RivieraKid 14y ago

Python just 8x slower than C and 4x slower than Java? That's actually pretty good result for Python.

cdavid 14y ago

I think LuaJIT is the outlier, not python. All other implementations got lots of resources to make them fast, except for LuaJIT.

copx 14y ago
PyPy simply isn't at the same level as V8 and LuaJIT yet. V8 is a professional, full-time project employing some of the best programmers money can buy. And LuaJIT.. well LuaJIT is written by a fucking genius 10x programmer. Let me quote him: " The reason why X is slow, is because X's implementation is slow, unoptimized or untuned. Language design just influences how hard it is to make up for it. There are no excuses. " Source: http://www.reddit.com/user/mikemike http://www.reddit.com/user/mikemike (that's his reddit account) Python (and Ruby for that matter) could reach a comparable performance level if people with the necessary skills invested the necessary amount of effort.
- cdavid 14y ago
  Indeed, that's what I meant, even though my phrasing was unclear. Thanks for clarifying.

Symmetry 14y ago

That's actually an impressively good result. All that wonderful expressive power that Python has comes at a price in implementation complexity, and there are a lot of different cases that the JIT needs to handle with Python. Lua, by contrast, is pretty much Scheme in ALGOL's clothing and is ridiculously simple inside.

jayflux 14y ago

Python is a High Level language, it was never designed with the intention of being as fast as C or Java or other lower level languages. As someone else pointed out the V8 has had a lot of backing and full time development, where as pypy, Cpython hasn't had as much. Pypy is still showing massive improvements despite being the slowest on that list.