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python Programming Glossary: pypyhttp://stackoverflow.com/questions/1061283/lt-instead-of-cmp weight in every Python runtime Classic Jython IronPython PyPy ... . The code that definitely won't have bugs is the code that..
Why (0-6) is -6 = False? [duplicate] http://stackoverflow.com/questions/11476190/why-0-6-is-6-false of CPython and you shouldn't rely on this. For instance PyPy implemented the id of integer to return itself so 0 6 is 6 is..
Python string comparison pointing to the result http://stackoverflow.com/questions/12840451/python-string-comparison-pointing-to-the-result implementation specific because implementations such as PyPy could probably optimize the genexp into a single C for loop..
How are you planning on handling the migration to Python 3? http://stackoverflow.com/questions/172306/how-are-you-planning-on-handling-the-migration-to-python-3 someone might end up writing a 3to2 or another runtime PyPy comes to mind might allow for running 2.x and 3.x code in the..
Does python support multiprocessor/multicore programming? http://stackoverflow.com/questions/203912/does-python-support-multiprocessor-multicore-programming threads. The global interpreter lock in the CPython and PyPy runtimes preclude this option but only for those runtimes. In..
PyPy — How can it possibly beat CPython? http://stackoverflow.com/questions/2591879/pypy-how-can-it-possibly-beat-cpython &mdash How can it possibly beat CPython From the Google Open.. it possibly beat CPython From the Google Open Source Blog PyPy is a reimplementation of Python in Python using advanced techniques.. possible Which Python implementation was used to implement PyPy CPython And what are the chances of a PyPyPy or PyPyPyPy beating..
How can I sandbox Python in pure Python? http://stackoverflow.com/questions/3068139/how-can-i-sandbox-python-in-pure-python which might not work for you since you're using GAE is the PyPy sandbox . While I haven't used it myself word on the intertubes..
Which is faster in Python: x**.5 or math.sqrt(x)? http://stackoverflow.com/questions/327002/which-is-faster-in-python-x-5-or-math-sqrtx 52 Python 2.7 0.132 0.079 67 Python 2.6.6 0.121 0.075 61 PyPy 1.4.1 0.083 0.0159 422 Jython 2.5.1 0.132 0.22 40 Python 2.5.5..
How are Python's Built In Dictionaries Implemented http://stackoverflow.com/questions/327311/how-are-pythons-built-in-dictionaries-implemented hash collision If the slot is occupied CPython and even PyPy compares the the hash AND the key by compare I mean comparison..
Why doesn't memory get released to system after large queries (or series of queries) in django? http://stackoverflow.com/questions/5494178/why-doesnt-memory-get-released-to-system-after-large-queries-or-series-of-quer holding a lot of extra memory. When people talk about PyPy using less memory than CPython this is a major part of what.. is a major part of what they're talking about. Because PyPy doesn't use direct pointer references under the hood it is able..
Hash algorithm for dynamic growing/streaming data? http://stackoverflow.com/questions/5865824/hash-algorithm-for-dynamic-growing-streaming-data save its state. Here is an example using _md5.py from from PyPy import _md5 def md5_getstate md return md.A md.B md.C md.D md.count..
Is Python interpreted or compiled or both? http://stackoverflow.com/questions/6889747/is-python-interpreted-or-compiled-or-both
Python: Is explicitly closing files important? http://stackoverflow.com/questions/7395542/python-is-explicitly-closing-files-important aren't guaranteed to work this way. For example IronPython PyPy and Jython don't use reference counting and therefore won't..
Python: garbage collection fails? http://stackoverflow.com/questions/9617001/python-garbage-collection-fails drops back to the memory usage of a fresh interpreter and PyPy 1.8 python 2.7.2 also drops back down to the same level as a..
Is a string formatter that pulls variables from its calling scope bad practice? http://stackoverflow.com/questions/13312240/is-a-string-formatter-that-pulls-variables-from-its-calling-scope-bad-practice code would break when it isn't. Under jython ironpython or pypy it might not be available because it seems to be a cpython thing...
Does Python have a stack/heap and how is memory managed? http://stackoverflow.com/questions/14546178/does-python-have-a-stack-heap-and-how-is-memory-managed is CPython specific. Other python implementations such as pypy iron python jython and others may differ from one another and..
PyPy — How can it possibly beat CPython? http://stackoverflow.com/questions/2591879/pypy-how-can-it-possibly-beat-cpython note... why would anyone try something like this python pypy language implementation share improve this question Q1... the language and not the CPython interpreter . Refer https pypy.readthedocs.org en latest architecture.html for details. Q3... try something like this From the official site. https pypy.readthedocs.org en latest architecture.html#mission statement..
Python Compilation/Interpretation Process http://stackoverflow.com/questions/3299648/python-compilation-interpretation-process unless you are using some exotic implementation such as pypy. Other than that you have the description correct. The bytecode..
Good way to append to a string http://stackoverflow.com/questions/4435169/good-way-to-append-to-a-string as far as I know. The same empirical testing on pypy or jython for example might show the older O n 2 performance.. jython for example might show the older O n 2 performance pypy m timeit s s '' for i in xrange 10 s 'a' 10000 loops best of.. xrange 10 s 'a' 10000 loops best of 3 90.8 usec per loop pypy m timeit s s '' for i in xrange 100 s 'a' 1000 loops best of..
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell http://stackoverflow.com/questions/6964392/speed-comparison-with-project-euler-c-vs-python-vs-erlang-vs-haskell real 1m16.632s user 1m16.370s sys 0m0.250s python with pypy lorenzo@enzo ~ Downloads pypy c jit 43780 b590cf6de419 linux64.. sys 0m0.250s python with pypy lorenzo@enzo ~ Downloads pypy c jit 43780 b590cf6de419 linux64 bin time . pypy home lorenzo.. Downloads pypy c jit 43780 b590cf6de419 linux64 bin time . pypy home lorenzo erlang euler12.py 842161320 real 0m13.082s user..
Python: garbage collection fails? http://stackoverflow.com/questions/9617001/python-garbage-collection-fails 2.7.2 also drops back down to the same level as a new pypy process. So no you don't need to switch to another language...
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