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list/pushmark optimization

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Steffen Mueller
February 22, 2014 09:17
list/pushmark optimization
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Hi all,

I've pushed an implementation of the list/pushmark elision optimization 
to the smueller/fewer_listops branch. I think this kind of change 
warrants review. In particular, there's some open questions that I touch 
on in the commit message of the main commit (that's the HEAD of that 

FWIW, this makes some constructs such as array and hash slices 
significantly faster.

Feedback most welcome!

Best regards,

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