[issue3873] Unpickling is really slow

[Antoine Pitrou]

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

> Didn't Victor say that only one seek at the end is necessary per
> pickle? If this is the case, I don't think expensive seeks will be an
> issue.

If you are unpickling from a multi-megabyte gzip file and the seek at
the end makes you uncompress all the gzip file again, it can certainly
be a problem.

Another issue with seeking only at the end is that it would make
readline() quite more complicated. And, apparently, readline() is not
only used on protocol 0 but also on binary protocols.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3873>
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