jquery selector performance reports

gistfile1.js

var jqspm={
	searchedObjects: {},
	currentSelector: '',
	finalSelector: '',

	_utils: {
		makeNewSelector: function(id, selector, finSelector) {
			jqspm.currentSelector=selector;
			jqspm.finalSelector=finSelector;
			jqspm.searchedObjects[id]={
				selectors: jqspm.finalSelector,
				totalCount: 0,
				counts: [],
				totalTime: 0,
				timings: []					
			};
		}
	},

	start: function() {
		jQuery.fn.initSelectorPerfMonitorOrig=jQuery.fn.init;
		jQuery.fn.init=function(selector, context, rootjQuery) {
            // Return new Func without logging if no selector or context
            if(!selector && !context) return new jQuery.fn.initSelectorPerfMonitorOrig(selector, context, rootjQuery);

            var jqspmId=this.jqspmId || selector +'-'+ new Date() +'-'+ Math.random();
            rootjQuery.jqspmId=jqspmId;
			return new jQuery.fn.initSelectorPerfMonitorOrig(selector, context, rootjQuery);
		}

		// Save old find func for when we stop monitoring
		jQuery.fn.findSelectorPerfMonitorOrig=jQuery.fn.find;
		// Add our wrapper func
		jQuery.fn.find=function(selector) {
			// Log start time and call original jQuery.find
			var start=new Date(),
				ret=jQuery.fn.findSelectorPerfMonitorOrig.apply(this, arguments),
				time=new Date()-start;
            if(this.jqspmId) ret.jqspmId=this.jqspmId;
            if(!jqspm.searchedObjects[ret.jqspmId]) {
                jqspm._utils.makeNewSelector(ret.jqspmId, selector, this.selector);
            }
			// Log details of this find operation
            jqspm.searchedObjects[ret.jqspmId].selectors+= (jqspm.searchedObjects[ret.jqspmId].selectors ? ' => ': '') + selector;
			jqspm.searchedObjects[ret.jqspmId].timings.push(time);
			jqspm.searchedObjects[ret.jqspmId].totalCount+=ret.length;
			jqspm.searchedObjects[ret.jqspmId].counts.push(ret.length);
			jqspm.searchedObjects[ret.jqspmId].totalTime+=time;
			return ret;
		}
	},

	stop: function() {
		// Replace our wrapper funcs with originals, then delete our original copies
		jQuery.fn.init=jQuery.fn.initSelectorPerfMonitorOrig;
		jQuery.fn.find=jQuery.fn.findSelectorPerfMonitorOrig;
		delete(jQuery.fn.initSelectorPerfMonitorOrig);
		delete(jQuery.fn.findSelectorPerfMonitorOrig);
	},

	// Quick func to simply print out results if console.table isn't supported
	// Adds this table to bottom of the page, or to selector if you pass it.
	printReport: function(selector) {
        // Use browser to escape HTML
        function escapeString(str) {
            var cont=document.createElement('DIV');
            cont.appendChild(document.createTextNode(str));
            return cont.innerHTML;
        }

        function stringifyDOMElement(elm) {
            var str=elm.tagName;
            if(elm.id) str+='#'+ elm.id;
            if(elm.className) str+='.'+ elm.className;
            return str;
        }

		if(!selector && window.console && console.table) {
			console.table(jqspm.searchedObjects);
			return;
		}
		if(!selector) selector='BODY';

		var tableHeadings=['Selectors', 'Total Count', 'Counts', 'Total Time', 'Timings'],
			html='<table cellpadding="5" cellspacing="5" border="1"><tr><td>'+ tableHeadings.join('</td><td>') + '</td></tr>',
			tmp, item;
		for(var pResult in jqspm.searchedObjects) {
			item=jqspm.searchedObjects[pResult];
            // Skip lines where there is only 1 item, and it's HTML
            if(item.htmlSelector && !item.counts.length) continue;
            // Expand out Object selectors
            if(typeof item.selectors!=='string' && item.selectors.nodeType==1) item.selectors='*'+ stringifyDOMElement(item.selectors) +'*';
            //if(typeof item.selectors )
			tmp=[escapeString(item.selectors), // Print escaped selector, including HTML
				item.totalCount,
				item.counts.join(', '),
				item.totalTime,
				item.timings.join(', ')
			];

			html+='<tr><td>'+ tmp.join('</td><td>') +'</td></tr>';
		}
		html+='</table>';
		$(selector).append($(html));
	}
}

/* Bit of code to handle auto-starting the monitor */
jqspm.start();
console.log('jqspm.stop();jqspm.searchedObjects;jqspm.printReport()');