Use the caching functionality of vlibTemplate.
All you have to do is change your class instantiation from vlibTemplate to vlibTemplateCache.
This will make your page scream along. You see, otherwise vlibTemplate has to parse the templates using regexs each time, which takes time, and the bigger your template, the longer it will take.
If you cache, you can cut down the time it takes to parse a template by hundreds of %.
Give it a try, youll never go back.
Kelvin