Cache units, compatibility and equivalence

Brings compatible_units() and equivalent_units() from 65 us to 5 us.

Brings the baseline runtime for the minimal 1y simulation from 80 ms to 42 ms.

Fixes #91 (closed).

added performance label

assigned to @mlange

added 1 commit

• 97b17e91 - cache units compatibility and equivalence

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• d38f166f - also cache the units themselves

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changed title from Cache units compatibility and equivalence to Cache units, compatibility and equivalence

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merged

mentioned in commit 7fac418f