Do's and dont's performance

[mc_hendriks]

First of all I'm new in using Image::Magick so have patience with me

I'm using Image::Magick from perl for creating images from scratch, drawing shapes and annotating text on images.
For examples see http://digirent.nl/images/proef/

When trying the default font versus true type fonts I see remarkable difference in creation time.

I very curious in the do's and don't or any advice for reaching optimal performance.