Timezone page halts when searching for locations

[Omer Akram]

1. Open system settings
2. Go to Time & Date
3. Search for timezon by typing first few characters of a city

What happens:
The settings apps halts for 2 seconds and then resumes.

Please make location searching fast.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubuntu-system-settings 0.3+14.10.20140904.2-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-14.20-generic 3.16.2
Uname: Linux 3.16.0-14-generic x86_64
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Sep 9 18:13:51 2014
InstallationDate: Installed on 2014-06-14 (86 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140610.1)
SourcePackage: ubuntu-system-settings
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

There are lot of locations in the db, I guess we could optimize a bit though, or it's going to resolve itself with better hardware