[issue38938] Possible performance improvement for heaqq.merge()

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

For comparison, I'm attaching an iterative version that manipulates the tree nodes with all local variables.  Try it out and see what you think.

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Added file: https://bugs.python.org/file49157/new_merge.py

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