devlights / python_dunder_all_iall_speed_diff

python_dunder_all_iall_speed_diff

Environment

$ python -m bpython
bpython version 0.24 on top of Python 3.12.0 /home/gitpod/.pyenv/versions/3.12.0/bin/python
>>> import sys
>>> sys.executable
'/home/gitpod/.pyenv/versions/3.12.0/bin/python'

Run

$ task
task: [default] hyperfine "python dunder_add.py" "python dunder_iadd.py"
Benchmark 1: python dunder_add.py
  Time (mean ± σ):      1.210 s ±  0.018 s    [User: 0.835 s, System: 0.376 s]
  Range (min … max):    1.173 s …  1.233 s    10 runs
 
Benchmark 2: python dunder_iadd.py
  Time (mean ± σ):      79.2 ms ±   2.6 ms    [User: 46.4 ms, System: 34.7 ms]
  Range (min … max):    74.1 ms …  88.2 ms    37 runs
 
Summary
  python dunder_iadd.py ran
   15.27 ± 0.54 times faster than python dunder_add.py

REFERENCES

• hyperfine
• a=a+b and a+=b are not always same in Python
• Different behaviour for list.iadd and list.add