On Sat, Dec 29, 2012 at 12:25:04PM +0700, Nguyen Thai Ngoc Duy wrote:

> > But just dropping the compression (or doing partial
> > decompression when we only care about the beginning part) is way less
> > code and complexity.
> I think I tried the partial decompression for commit header and it did
> not help much (or I misremember it, not so sure).

I'll see if I can dig up the reference, as it was something I was going
to look at next.

> > There's no cache to manage.
> If reachability bitmap is implemented, we'll have per-pack cache
> infrastructure ready, so less work there for commit cache.

True. I don't want to dissuade you from doing any commit cache work. I
only wanted to point out that this alternative may have merit because of
its simplicity (so we can use it until a caching solution exists, or
even after, if managing the cache has downsides).

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