You can use a global WeakKeyDictionary keyed by the object to achieve the same 
without having anything on the object.

    On Friday, October 16, 2020, 09:37:05 AM GMT+1, Ram Rachum 
<r...@rachum.com> wrote:  
 Did you mean like keeping a hidden attribute on the object with the result? 
Well, that'd require manually keeping track of these attributes for each method 
I'm caching. I do that sometimes, but it's verbose. 

  
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