I've filled my suggested improvement in the debian bug system for apt- xapian-index I guess its now up to upstream to agree.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689717 ** Bug watch added: Debian Bug tracker #689717 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=689717 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to software-center in Ubuntu. https://bugs.launchpad.net/bugs/845579 Title: software-center terribly slow, ubuntu freezing Status in “software-center” package in Ubuntu: Confirmed Bug description: When I launch software-center it takes really long, pc is unusable, when I try to do something in the meanwhile it even freezes. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: software-center 4.1.21 ProcVersionSignature: Ubuntu 3.0.0-10.16-generic 3.0.4 Uname: Linux 3.0.0-10-generic x86_64 ApportVersion: 1.22.1-0ubuntu2 Architecture: amd64 Date: Fri Sep 9 14:49:57 2011 PackageArchitecture: all ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: software-center UpgradeStatus: Upgraded to oneiric on 2011-09-07 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/845579/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

