Limiting JS Function calls to avoid frequent calls. Origin http://ryhan.org/post/33374611308/limiting-function-calls

call_rate_limiter

//// some function
//var foo = function ( data ){ console.log(data); }
//// identical to foo(), except can only be called once every 100ms.
//var limitedFoo = trickle(foo, 100);
////
function trickle( fun , waitLength )
{
   var lastCalledAt = 0,
       context = this;

   return function(){
      var now = (new Date()).getTime();
      if (now > lastCalledAt + waitLength )
      {
         lastCalledAt = now;
         fun.apply(context, arguments);
      }
   }
}