On Fri, Oct 25, 2013 at 02:00:48PM +0000, Shawn O. Pearce wrote:

> On Thu, Oct 24, 2013 at 6:06 PM, Jeff King <p...@peff.net> wrote:
> > Note that most of the time we spend for --count invocations is on
> > generating the pack revindex. It may be worth storing a revidx (either
> > in a separate file, as part of the .idx, or as an optional section in
> > the .bitmap file).
> This was discussed before, and it may make sense to cache the revidx.
> I'm glad to see the timings are already better with bitmaps, even
> though the revidx has to be computed on the fly for each invocation.

The radix sort makes a _huge_ difference there. But I would still like
an mmap-able .revidx cache. I think we can get at least another
order-of-magnitude speedup.

I'm intentionally leaving that out for now, though. I want to get this
series merged before trying to go much further.

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