We're pleased to announce the 1.5 release of PyPy. This release updates PyPy with the features of CPython 2.7.1, including the standard library. Thus all the features of CPython 2.6 and CPython 2.7 are now supported. It also contains additional performance improvements. You can download it here: http://pypy.org/download.html What is PyPy? PyPy is a very compliant Python interpreter, almost a drop-in replacement for CPython 2.7.1. It's fast (pypy 1.5 and cpython 2.6.2 performance comparison) due to its integrated tracing JIT compiler. This release includes the features of CPython 2.6 and 2.7. It also includes a large number of small improvements to the tracing JIT compiler. It supports Intel machines running Linux 32/64 or Mac OS X. Windows is beta (it roughly works but a lot of small issues have not been fixed so far). Windows 64 is not yet supported. Numerous speed achievements are described on our blog. Normalized speed charts comparing pypy 1.5 and …
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