Alexander Belopolsky added the comment:

> In embedded systems, every byte of memory counts 

It is not just embedded systems.  The range 192 KB to 1.5 MB is where typical 
L2 cache sizes are these days.  I would expect that the intern dictionary is 
accessed very often and much more often than the actual strings.  In theory, if 
it fits in L2 cache, the performance will be much higher than if it is even 
slightly over.

This said, when I was looking at this 3-4 years ago, I did not see measurable 
improvements in my programs.

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<http://bugs.python.org/issue19187>
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