Throttle event calls in jQuery

Here is a potential solution that doesn't need a plugin. Use a boolean to decide whether to do the keyup callback, or skip over it.

var doingKeyup = false;

$('input').keyup(function(){
    if(!doingKeyup){
        doingKeyup=true;
        // slow process happens here
        doingKeyup=false;
    }
});

Take a look at jQuery Debounce.

$('#search').keyup($.debounce(function() {
    // Will only execute 300ms after the last keypress.
}, 300));