dagsearch speedup

[kahlmeyer94]

It looks like the automatic testing failed because dagsearch took > 1h. Hence I lowered the number of iterations and added the possibility to use multiprocessing.

[lacava]

you can add parameters that are specific to testing if you want to just speed it up for the tests: here is an example from PySR's regressor.py of how to do it:

eval_kwargs = {
    "test_params": dict(
        niterations=3,
        ncyclesperiteration=500,
        populations=3,
    )
}

test_params is then set by calling est.set_params(**test_params) on your estimator

[kahlmeyer94]

Okay thanks! Then I will rework my stuff and try again.