[issue19087] bytearray front-slicing not optimized

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> No, because PyByteArray_Resize() is always called afterwards to ensure
> that the buffer is resized when it gets below 50% usage.
>

I.e. the bytearray is compacted from time to time.

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<http://bugs.python.org/issue19087>
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