pypy

PyPy — How can it possibly beat CPython?

由 我怕爱的太早我们不能终老 提交于 2019-11-26 18:43:14
问题 From the Google Open Source Blog: PyPy is a reimplementation of Python in Python, using advanced techniques to try to attain better performance than CPython. Many years of hard work have finally paid off. Our speed results often beat CPython, ranging from being slightly slower, to speedups of up to 2x on real application code, to speedups of up to 10x on small benchmarks. How is this possible? Which Python implementation was used to implement PyPy? CPython? And what are the chances of a

Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?

由 非 Y 不嫁゛ 提交于 2019-11-26 14:57:26
问题 I've been hearing a lot about the PyPy project. They claim it is 6.3 times faster than the CPython interpreter on their site. Whenever we talk about dynamic languages like Python, speed is one of the top issues. To solve this, they say PyPy is 6.3 times faster. The second issue is parallelism, the infamous Global Interpreter Lock (GIL). For this, PyPy says it can give GIL-less Python. If PyPy can solve these great challenges, what are its weaknesses that are preventing wider adoption? That is

How to run pip of different version of python using python command?

由 我是研究僧i 提交于 2019-11-26 14:35:43
I'm now currently using Python on ubuntu 15.10 But in my OS, I have many different python version installed: Python (2.7.9) Python3 (3.4.3) Python3.5 PyPy So, I got mess about the version of their package environment, for example, if I run: pip3 install django In fact I cannot import django inside python3.5 . Is there any efficiently way to call the relating version of pip ? PS: Don't suggest that I use virtualenv, I know about it and am seeking another solution. Finally I found the solution myself, see the Docs: https://docs.python.org/3/installing/index.html?highlight=pip#work-with-multiple

How to run pip of different version of python using python command?

由 ﹥＞﹥吖頭↗ 提交于 2019-11-26 03:57:14
问题 I\'m now currently using Python on ubuntu 15.10 But in my OS, I have many different python version installed: Python (2.7.9) Python3 (3.4.3) Python3.5 PyPy So, I got mess about the version of their package environment, for example, if I run: pip3 install django In fact I cannot import django inside python3.5 . Is there any efficiently way to call the relating version of pip ? PS: Don\'t suggest that I use virtualenv, I know about it and am seeking another solution. 回答1: Finally I found the
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