[Leeroy.]

Well Jquery is widely used by web designers and developers but mootools or dojo usage is low when compared to Jquery. Mootools is a edit of Jquery. But Jquery is faster in executing scripts and it has more functions than mootools/dojo only disadvantage of Jquery is it hold only 1 dozen of array/object/string but mootools can hold 6 dozens of array/object/string. But Dojo is faster and safe then mootools or Jquery. So i would prefer dojo or jquery.

You can test it here

Run 2 - 3 tests for accurate results.