Do you have one (or a few) particularly slow pages? If so, I can optimize them for you, using the principles from my book. Once they're optimized, you can apply the resulting code and patterns to other similar pages on your site, or use the changes as a learning or teaching aid.
The potential optimization include things like:
You will need to either provide your pages and associated database in a package that I can install and run locally, or provide access to a development environment that's accessible over Remote Desktop.
If this interests you, please send the following information, so that I can provide a quote: