Multiple bindings on one site slow down performance?

Multiple bindings on one site slow down performance?

On our website we wanna bind a click (or maybe mouseover)-event on every user-image. The click on the image should open a layer with further information about the user. Now i look for a best practice way to solve this (focus on performance), because there could be a lot of user-images on one side. I think, if i bind the event on a class like this

jQuery('.myclass').bind('click', function(
      makerequest;
      openlayer;
))


that could slow down the site, because i read, that "The class selector is the slowest selector in jQuery".
First idea was: Back to the roots and insert an onclick(function) to the element, but i'm not realy happy with that solution.
So, have anybody some experiences with that and suggestions to solve that problem?