[PATCH 4 of 4] dirstate: avoid use of zip on big lists

[Bryan O'Sullivan]

On Fri, Nov 30, 2012 at 4:07 PM, Matt Mackall <mpm at selenic.com> wrote:

>
> Further, if we're motivated by space overhead, the list passed to
> statfiles could be a generator. That tends to be a loss on non-gigantic
> lists though.
>

I tried a few variants on the statfiles approach earlier in the day, and
this turned out to perform the best. Passing in a generator was slower, for
instance.


> As this is apparently the only user of statfiles, perhaps a better API
> is possible.
>

The only maybe-better approach I could think of was to pass the dict to be
modified to statfiles and let it modify it directly, but that's just yucky
as an API.
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