memoize_in is possibly too heavyweight for geometric quantities, we could directly use a dict

[inducer]

Here's some data from a similar test run as the one described in #146 (comment):

I've circled the bits that are connected to @memoize_in.

cc @thomasgibson @lukeolson

[thomasgibson]

Could you elaborate what you mean by "we could directly use a dict"?

[inducer]

Literally:

try:
    return my_cache_dict[key]
except KeyError:
    # compute the thing
    my_cache_dict[key] = the thing
    return the thing