最近在做性能测试的时候发现BingMap内存泄露（memory leak）的问题，查找了一些国外的帖子，，发现也有类似的问题，但是没有好的解决办法。
https://social.msdn.microsoft.com/Forums/en-US/3226f255-2ae1-4718-b848-5f24e76b64b0/your-pushpins-are-broken-addremove-leads-to-memory-leak?forum=bingmapsajax
经过一番尝试，找到了一个折中的解决方案，分享一下。
先贴一下Testing Code吧：
<!DOCTYPE html><%–<meta http-equiv='x-ua-compatible' content='IE=7;IE=9' />–%><html xmlns=""><head runat="server"><title></title><script src="Scripts/jquery-1.8.3.min.js" type="text/javascript"></script><script charset="UTF-8" type="text/javascript" src="?v=7.0"></script></head><body><form id="form1" runat="server"><div id="myMap" style="width:800px;height:600px;position:absolute"></div><input id="btnAdd" type="button" style="position:absolute;top:700px;left:10px;" value="Add" onclick="addBatchPushpin();"/><input id="btnDelete" type="button" style="position:absolute;top:700px;left:110px;" value="Delete" onclick="deleteBatchPushpin();" /><input id="btnClear" type="button" style="position:absolute;top:700px;left:210px;" value="Clear" onclick="clearPushpin();"/><input id="Button1" type="button" style="position:absolute;top:700px;left:310px;" value="Find" onclick="findPushpin();"/><div id="hidElement"></div></form></body></html><script type="text/javascript" >var map = null;var _layer = null;var _bingMapKey = "ApirbCqPCAM1bVBVeh5CrrNm-7lzdCkbDT5OPkck8pXXeKWWGNUrIGsTqlkDHlu8";$(document).ready(function (){var mapOptions = {credentials: _bingMapKey,enableClickableLogo: false,enableSearchLogo: false,showMapTypeSelector: true,showCopyright: false}map = new Microsoft.Maps.Map($("#myMap")[0], mapOptions);var infoboxLayer = new Microsoft.Maps.EntityCollection();map.entities.push(infoboxLayer);map.setView({ animate: true, zoom: 5, center: new Microsoft.Maps.Location(40, -71) });_layer = new Microsoft.Maps.EntityCollection();map.entities.push(_layer);//var lat = 40.56090348161442;//var lon = -74.345836486816438;//addPushpin(lat,lon);setInterval(addBatchPushpin, 500);setInterval(deleteBatchPushpin, 1000);})function addBatchPushpin(){var lat = 40.56090348161442;var lon = -74.345836486816438;for (var i = 0; i < 20; i++){var randomLatitude = Math.random() + lat;var randomLongitude = Math.random() + lon;addPushpin(randomLatitude, randomLongitude);}}function deleteBatchPushpin(){var len = _layer.getLength();for (var i = 0; i < len; i++){_layer.removeAt(0);$('#cfsNew').remove();window.CollectGarbage();}}function addPushpin(lat, lon){var htmlTest = '<table id="cfsNew" cellpadding="0" cellspacing="0"><tr><td><div style="border: black 2px solid; padding-bottom: 0em; line-height: 12px; background-color: white; margin: 0em;padding-left: 0px; padding-right: 0px; font-family: Arial; color: black;font-size: 12px; font-weight: bold;padding-top: 0em;"><div style="white-space: nowrap;">{P2012-001093} </div><div style="font-weight: bold; font-size: 12px; font-family:Arial"><table style="font-size:inherit;" cellpadding="0" cellspacing="0"><tr><td style="width: 5px; height:5px;"><div style=" background-color: rgb(0,128,0); width: 5px;display: block; margin-bottom: 2px; height: 6px; overflow: hidden; margin-right: 1px"> </div></td><td style="color: rgb(0,128,0);font-size: 12px; font-family:Arial; font-weight:bold;">{297}</td></tr><tr><td style="width: 5px;"><div style=" background-color: rgb(0,128,0); width: 5px;display: block; margin-bottom: 2px; height: 6px; overflow: hidden; margin-right: 1px"></div></td><td style="color: rgb(0,128,0);font-size: 12px; font-family:Arial; font-weight:bold;">907</td></tr><tr><td style="width: 5px;"><div style=" background-color: rgb(255,0,0); width: 5px;display: block; margin-bottom: 4px; height: 6px; overflow: hidden; margin-right: 1px"></div></td><td style="color: rgb(0,128,0);font-size: 12px; font-family:Arial; font-weight:bold;">401</td></tr><tr><td style="width: 5px;"><div style=" background-color: rgb(0,0,220); width: 5px;display: block; margin-bottom: 4px; height: 6px; overflow: hidden; margin-right: 1px"></div></td><td style="color: rgb(0,128,0);font-size: 12px; font-family:Arial; font-weight:bold;">408</td></tr></table></div></div></td></tr><tr><td align="center"><div align="center"><img style="position:relative; width: 40px; height: 40px; left: 20px;top:-1px;" src="Images/ReOpened Box.png" /><img style="position:relative; width: 35px; height: 35px; left: -21px; top: -1px;" src="Images/pin.png" /></div></td></tr></table>';var loc = new Microsoft.Maps.Location(lat, lon);var html = htmlTest;var pushpinOptions = { htmlContent: html, zIndex: 100000, width: getWidth(html) };var pushpin = new Microsoft.Maps.Pushpin(loc, pushpinOptions);_layer.push(pushpin);}function clearPushpin(){_layer.clear();window.CollectGarbage();}function findPushpin(){var test = $('#cfsNew').length;alert(test);}function getWidth(html){element = $("#hidElement");element.html(html);var height = element[0].scrollHeight;var width = element.children().width();return width;}</script>玩坏了可以选择重来，
