Benchmarking, profiling and performance
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When benchmarking code it is important to reduce other load on the
system (music player, web browser for example).  One can use the
python "timeit" module or a command line utility like hyperfine:

   python -m timeit -s 'from khard.khard import main' 'main(["list"])'
   hyperfine 'python -m khard list'

For profiling the "cProfile" python module works well.  With the help
of gprof2dot one can generate quite useful graphs:

   python -m cProfile -o output.file -m khard list
   gprof2dot -f pstats --show-samples output.file | dot -T png > graph.png
   xdg-open graph.png
