Articles about programming

1. From python script to executable with cython

   Recently I saw that you could convert python scripts into executable with the help of cython, and I had to try that.

2. On Python speed

   As an engineer, I write a lot of small python programs as tools for specific tasks. Generally, these are not large programs. Most of them are below 100 lines of code (“LOC”, as measured by cloc), although there are a few in the 300−400 LOC range.

   In this article, I will present some observations about these, and draw some conclusion from them.

3. Python 3.11 speed comparison with 3.9

   Since Python 3.11.0 came out recently, I wanted to compare its speed with 3.9.15 on some of my own “benchmark” programs.

   Both versions are in the default configuration as built by the FreeBSD ports system.

   TL;DR Python 3.11 yielded speed improvements in the order of 25% in my tests.

4. Getting the first or last item from a dictview without a list

   In this article we will discuss a faster and more efficient way to get only the first item from a view object in Python.

5. Examining an OpenSSH ECDSA public key

   Intrigued by this question, I investigated the structure of an OpenSSH ECDSA public key.

6. Python & standard output redirection on ms-windows

   Redirecting standard output of the Python script on ms-windows can cause strange crashes because of encoding differences.

7. Profiling Python scripts (5): ent_without_numpy

   This is the fifth in a series of articles that covers analyzing and improving performance bottlenecks in Python scripts. The program ent_without_numpy.py is a lot slower than the version that uses numpy. The performance of ent_without_numpy.py is the topic of this article.

8. Profiling Python scripts (4): vecops.indexate

   This is the fourth in a series of articles that covers analyzing and improving performance bottlenecks in Python scripts. The performance of stl2ps is the topic of this article.

9. Profiling Python scripts (3): stl2ps

   This is the third in a series of articles that covers analyzing and improving performance bottlenecks in Python scripts. The performance of stl2ps is the topic of this article.

10. Profiling Python scripts (2): stlinfo

    This is the second in a series of articles that covers analyzing and improving performance bottlenecks in Python scripts. In this second article the performance of stlinfo is looked at.