[issue21419] Use calloc() instead of malloc() for int << int (lshift)

[Josh Rosenberg]

Josh Rosenberg added the comment:

Given your benchmarks show improvements (you posted while I was typing my last comment), I'm guessing it's just the posted patch that's wrong, and your local changes actually use use_calloc?

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21419>
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