Daniel Fleischman <danielfleisch...@gmail.com> added the comment:

I think the idea of augmenting the struts to maintain a linked list of elements 
together with periodically shrinking on removal would solve both time and space 
issues, right? 

Space will be always linear, and operations would still be constant amortized 
time (of course the worst case of removing will be linear because of the 
shrinking, but I guess this behavior is expected).

I wrote a worse example in bad_dict_example.py submitted to this issue.  This 
example would be fixed simply by the shrinking, but as is it's a pretty 
unexpected bug, as a simple sum(d.values()) can take milliseconds on a 
dictionary with only one entry (both key and value are int).

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44555>
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