speed up relink script

[TK Soh]

On 3/19/07, TK Soh <teekaysoh at gmail.com> wrote:
> I was trying out the relink script recently added to crew repo. While
> it works, it seemed a bit slow running on those hugh repos I have
> (some of the .hg/ are coming close to 1GB). So I tried the following
> patch to speed things up a little. See if anyone find it useful, or
> probably spot any problem with it.

BTW, here some benchmark data, taken from one of the repo with .hg/ of
about 360MB:

crew rev:
7.93u 10.82s 1:00.11 31.1%

patched rev:
1.05u 0.97s 0:06.04 33.4%