[WIP] Benchmarks

[djps]

As a work in progress, can't be merged, but

• What figures and analysis should be performed?

As it is not part of the k-wave example set things are less well-defined.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 66.66667% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 67.78%. Comparing base (0911060) to head (c819b31).

Files	Patch %	Lines
kwave/utils/filters.py	66.66%	6 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #326      +/-   ##
==========================================
+ Coverage   67.76%   67.78%   +0.02%     
==========================================
  Files          48       48              
  Lines        7066     7071       +5     
  Branches     1605     1605              
==========================================
+ Hits         4788     4793       +5     
- Misses       1697     1698       +1     
+ Partials      581      580       -1     

Flag	Coverage Δ
3.10	67.94% <66.66%> (+0.02%)	:arrow_up:
3.11	67.94% <66.66%> (+0.02%)	:arrow_up:
3.12	67.94% <66.66%> (+0.02%)	:arrow_up:
3.9	67.75% <66.66%> (+0.02%)	:arrow_up:
ubuntu-latest	67.72% <66.66%> (+0.02%)	:arrow_up:
windows-latest	67.72% <66.66%> (+0.02%)	:arrow_up:

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[waltsims]

Since it is a benchmark a description of the benchmark with a link to the paper, one figure and a table with the performance results would be a good place to start. What do you think?