Performance
As mentioned in the readmap update, performance will be the key thing in the upcoming 0.6.3 release.
While there reamain still things to be improved, the already implemented changes will make things way faster.
One very obvious thing to do to make things faster is to cache generated HTML. The cache could be memory, the filesystem or even the database (in certain situations). For ZenMagick, I chose the filesystem, as it is fast and there are existing solutions to handle cached data. Zenmagick is going to use Cache_Lite.
