modelCacher

sherpa.models.model.modelCacher(func: Callable) → Callable

A decorator to cache ArithmeticModel evaluations.

Apply to the calc method of a model to allow the model evaluation to be cached. The decision is based on the integrate setting, the evaluation grid, parameter values, and the keywords sent to the model.

For historic reasons, this decorator was implemented for 1D models first. However, it is general enough that it works in higher dimensions, too. It can be used as either @modelCacher1d or @modelCacher; the names are aliases for each other.

Notes

The keywords are included in the hash calculation even if they are not relevant for the model (as there’s no easy way to find this out).

Examples

Allow MyModel model evaluations to be cached:

def MyModel(ArithmeticModel):
    ...
    @modelCacher
    def calc(self, p, *args, **kwargs):
        ...