Andrew Turner wrote:
On Sat, 16 Jun 2007 21:53:06 -0700
Tim Kientzle <[EMAIL PROTECTED]> wrote:
Also, were the bottlenecks seen in pkg_delete and pkg_add, or
does it appear to be distributed across the board?
The biggest time sink in pkg_add is writing each file to a temp
dir then copying it to its final location. There are a couple
of strategies for avoiding this (by writing the files directly
to their final location), but it basically requires rewriting
pkg_add from scratch. I prototyped this a long time ago and
found about a 3x speedup. (Parts of that prototype eventually
became libarchive.)
I've also seen a 3x speedup by using my reimplementation of pkg_add
using my package management library, libpkg (http://libpkg.berlios.de).
It is not production ready yet as if it fails partway through an
installation it won't clean up and installed files.
I haven't looked closely at pkg_delete, but I doubt there's
much that can be done to speed it up; once you've examined the
dependency information to determine what can be deleted,
actually removing the files is a pretty straightforward
operation.
I ran a quick test on installing and removing a single package with
both the cvs and my own version of pkg_delete. I got a small but
significant speed improvement with my implementation. The difference
was too small to be noticeable by a human though (from 0.11s to 0.07s).
Andrew
Your source looks very nice, but there are a few comments:
1. How do you read BDB stuff without including the BDB headers/libs?
2. I can't go and graft your libs, or do something similar with the
current source because I don't want to break production code
(pkg_install) of this importance and muck up a lot of user's systems
irrevocably. I'll be looking at your source though for good ideas and
see if I can integrate them into the existing pkg_install set though,
and give you credit where necessary.
Thanks,
-Garrett
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