I have found that you can use one set of javascript on a page and keep mobile speed in a reasonable range (for me I have 5 to 7 second load). However, if you place anymore, your speed jumps to the middle teens or so.
This is also the case if you have set up additional datasets to a page to sort or pull in other information to a repeater/table. Using datasets is an effective and easy way to manipulate your data (simpler than hooks in the database itself). However, has anyone got experience on what using hooks in a database does to load times? I haven’t gotten the full grasp of implementing a hook, so inquiring before I dig too far into using.