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Wrap memoized values in weak refs #846

merged 1 commit into from Mar 28, 2016

Wrap memoized values in weak refs #846

merged 1 commit into from Mar 28, 2016


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@ddfreyne ddfreyne commented Mar 28, 2016

Memoized values only exist to speed up calculations, and are okay to be garbage-collected when memory pressure rises.

The Wrapper is necessary in order to let the value pointed to by the weak ref behave exactly as the calculation result. In particular, nil is troublesome as it requires syntactic support from Ruby to be handled properly, and weak refs to nil don’t behave the same as nil itself.

@ddfreyne ddfreyne merged commit ed8eac5 into master Mar 28, 2016
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@ddfreyne ddfreyne deleted the weakref-memoize branch Mar 28, 2016
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