Python's first day of high-level language and low-level language love and hatred

1 high-level language: Python java ... Generate byte code

2 Low-level languages: C-Compilation ... Generate machine code

3 Low-level language love high-level language, because most of the high-level language is written in low-grade language, so the low-level language will help the high-level language of its generated byte code into machine code unconditionally, and then to the System program, please system program calls hardware to execute these machine code.

4 high-level languages before the competition, they compare the financial (development cycle) and their own strength (running speed), the result they are unique, Python deep-pocketed (library Class), the development cycle is short, the code is small, JAVA runs relatively fast (its own strength), but its own library is relatively small.

5python species: Javapython cpython (this type is typically used by default) C#python pypy (python python)

6 pypy Download the tool library, Python generated bytecode first to the low-level language to convert to machine code, and then to the machine code to PyPy, wait until later run is, by PyPy directly to the machine code system software, so that can speed up the speed of running the program, but PyPy is not too perfect and stable.

Python's first day of high-level language and low-level language love and hatred