[issue7593] Computed-goto patch for RE engine

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

On the principle nothing looks wrong. There are some tabs-vs-spaces
issues in _sre.c. Can some out-of-bounds crash be triggered if an opcode
is greater than 33?

It needs some benchmarks to know whether it's efficient. Also, I think
it would be nice to include regeneration of the opcode table in the
build process. Since it's very light-weight it can be done
unconditionally (I suppose it will be done from setup.py, right?).

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