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

[Demur Rumed]

Demur Rumed added the comment:

Benchmarked f'X is {x}' with BUILD_TUPLE change:

Before: 6.62 usec per loop
After: 6.33 usec per loop

f'X is {x} {x+2} {x+3}'
Before: 15.1 usec per loop
After: 14.7 usec per loop

Attached patch

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keywords: +patch
Added file: http://bugs.python.org/file43701/fstrtup.patch

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