Re: [PATCH] lookup_object: prioritize recently found objects

From: Junio C Hamano <gitster@pobox.com>
Date: May 1, 2013, 21:57 UTC
Message-ID: <7vwqri4b4g.fsf@alter.siamese.dyndns.org>
In-Reply-To: <20130501203449.GA12535@sigill.intra.peff.net>

Jeff King <peff@peff.net> writes:

Show 11 quoted lines

> We could instead bump X into the `i` slot, and then shift
> the whole contiguous chain down by one, resulting in:
>
> index       | i-1 |  i  | i+1 | i+2 |
>        -----------------------------------
> entry   ... |  A  |  X  |  B  |  C  | ...
>        -----------------------------------
>
> That puts our chain in true most-recently-used order.
> However, experiments show that it is not any faster (and in
> fact, is slightly slower due to the extra manipulation).

Makes quite a lot of sense to me.  Very simple, clean and nice.