A tracer object to Titanium Mobile to show elapsed time and memory usage

tracer.js

var tracer = {}; 
(function() {

	tracer.levels = {};
	tracer.levels.DEBUG = 1;
	tracer.levels.INFO = 2;
	tracer.levels.WARN = 3;
	tracer.levels.ERROR = 4;
	tracer.levels.OFF = 5;
	tracer.allTracers = [];

	tracer.createTracer = function(name) {

		var t = {};
		t.name = name;
		
		t.startTimer = function(){
		  t.startTime = (new Date()).valueOf();
		};
		
		t.resetMemory = function(){
		 t.startMem = Ti.Platform.availableMemory;
		};
		
		t.startTimer();
	    t.resetMemory();
	    
		function makeMsg( msg ){
	      var dateTemp = new Date();
          var elapsed = dateTemp.valueOf() - t.startTime;
          var currMem = Ti.Platform.availableMemory;
          var avilableMem = Math.round(currMem) + 'mb';
          var deltaMem = Math.round(t.startMem - currMem) + 'mb';
          return( t.name  + "\t" + elapsed + "\t" + avilableMem + "\t" + deltaMem + "\t" + msg );
		};
		
		t.level = tracer.levels.INFO;
		
		t.setLevel = function(level) {
			t.level = level;
		};

		t.debug = function(msg) {
			if( t.level <= tracer.levels.DEBUG ){
			  Ti.API.debug(makeMsg(msg));	
			}
		};

		t.info = function(msg) {
			if( t.level <= tracer.levels.INFO ){
			  Ti.API.info(makeMsg(msg));	
			}
		};

		t.warn = function(msg) {
			if( t.level <= tracer.levels.WARN ){
			  Ti.API.warn(makeMsg(msg));	
			}
		};
		
		t.error = function(msg) {
			if( t.level <= tracer.levels.ERROR ){
			  Ti.API.error(makeMsg(msg));	
			}
		};

        tracer.allTracers.push(t);
        
        return t;

	};
	
	tracer.removeTracer = function( t ){
		var id = tracer.allTracers.indexOf( t );
		if( id > -1 ){
			tracer.allTracers.splice( id , 1 );
		}
	};
	
	tracer.UI = {};
	
})();

// Example Usage:
var exampleTracer = tracer.createTracer('example');
exampleTracer.setLevel( tracer.levels.INFO );
exampleTracer.debug( "This won't show ");
exampleTracer.info( "This will show");
// Do something that takes long
exampleTracer.startTimer();
for( var i = 0 ; i < 1000000 ; i++ ){
	// Do something that takes a while
}
exampleTracer.info( "How long did it take?");
exampleTracer.setLevel( tracer.levels.DEBUG );
exampleTracer.startTimer();
exampleTracer.resetMemory();
var webExample = Ti.UI.createWebView({
	url: "http://www.apple.com"
});
webExample.addEventListener('load', function(){
	exampleTracer.debug('web view load complete. How much memory did I use?');
});

Ti.UI.currentWindow.add( webExample );
exampleTracer.debug( "done");