Add automatic benchmarking to FLORIS

[paulf81]

Add automatic benchmarking to FLORIS

This draft PR is meant to add automatic code benchmarking to FLORIS. Proposed solution is to use pytest-benchmark to implement set timing tests:

https://pytest-benchmark.readthedocs.io/en/latest/

https://github.com/ionelmc/pytest-benchmark

And then try to schedule some semi-daily execution of these tests with logged performance checks so we can track changes over time. Here focused on:

https://github.com/benchmark-action/github-action-benchmark

To this end I added a first test to the tests folder including benchmarking to the tests/ folder and confirm the command line:

pytest floris_benchmark_test.py

Produces a benchmark result. At this point might open up for discussion, or others research:

1. Do these benchmarks belong in tests? Won't that cause them to be run with normal CI process?
2. What should we test?
3. We should set a test results page
4. Test parallel?
5. Want to track changes coming from our own work, and also those coming from improvement to python, should make sure CI checks most recent version of python?

To include:

• AEP for 100-turbine farm
• Analysis for different wake models
• Parallel FLORIS

[Bartdoekemeijer]

This is great!! On my end, I would love to see performance on, let's say, AEP calculation for a 100-turbine farm. Would also be nice to see this for different wake model set-ups, in case modifications are made to specific submodels. Benchmarking parallel floris would be a nice plus.

[paulf81]

This is great!! On my end, I would love to see performance on, let's say, AEP calculation for a 100-turbine farm. Would also be nice to see this for different wake model set-ups, in case modifications are made to specific submodels. Benchmarking parallel floris would be a nice plus.

Sounds good @Bartdoekemeijer ! Added a short todo-list above to track the intention