[issue15381] Optimize BytesIO to so less reallocations when written, similarly to StringIO

[Eli Bendersky]

Eli Bendersky <eliben at gmail.com> added the comment:

I'd like to take a shot at this, if Antoine doesn't mind. I'll prepare a patch for bytesio.c

Question: what set of benchmarks would it be good to run to make sure this doesn't degrade the performance of BytesIO in various cases?

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assignee:  -> eli.bendersky

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