[issue27078] Make f'' strings faster than .format: BUILD_STRING opcode?

[Roundup Robot]

Roundup Robot added the comment:

New changeset 28e280915508 by Serhiy Storchaka in branch 'default':
Issue #27078: Added BUILD_STRING opcode.  Optimized f-strings evaluation.
https://hg.python.org/cpython/rev/28e280915508

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nosy: +python-dev

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<http://bugs.python.org/issue27078>
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