【百度地图API】多家地图API内存消耗对比测验（带源码）
任务描述：
啊，美妙的春节结束了。酸奶小妹和妈妈的山西平遥之旅也宣告成功！距离平遥古城7km，有一个同样身为“世界文化遗产”的寺庙，叫做“双林寺”。双林寺的精致、纯木质结构、保存完好等特点，让我不由得为之一振。这让我想到了，万事万物都需要对比，“取其精华，去其糟粕”。
双林寺如是，API也如是。这不，上班第一天，我就迫不及待地做起了API性能测试。
如何实现：
使用不同家的API，分别以随机新增覆盖物为测试用例，观察内存消耗变化。
需要使用到不同家API来分别写测试用例。测试工具为IE6。
目前，有baidu、google、mapbar和mapabc。(2011-02-09 15:14更新，添加51地图)
图示：
说明：
在这里，我只列举了marker的代码，以作示范。
按这个原理，我还测试了标签、多边形、圆形、折线、信息窗口等覆盖物。
运行代码，请点击以下链接：
百度marker：http://ui-love.com/baidumap/apitest/marker-baidu.htm
谷歌marker：http://ui-love.com/baidumap/apitest/marker-google.htm
mapbar：http://ui-love.com/baidumap/apitest/marker-mapbar.htm
mapabc：http://ui-love.com/baidumap/apitest/marker-mapabc.htm
51ditu：http://ui-love.com/baidumap/apitest/marker-51ditu.htm
源代码：
百度marker：
代码
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.1&services=true"></script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
// 创建地图对象并初始化
var mp = new BMap.Map("map_container");
var point = new BMap.Point(116.404, 39.915);
mp.centerAndZoom(point, 14);
// 内存性能测试
var count = 0;
function createInfo() {
mp.clearOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束,一共运行"+count+"次。");
}
createMarkers();
}
function createMarkers(){
var bounds = mp.getBounds();
var lngSpan = bounds.maxX - bounds.minX;
var latSpan = bounds.maxY - bounds.minY;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new BMap.Point(bounds.minX + lngSpan * (Math.random() * 0.7 + 0.15),
bounds.minY + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new BMap.Marker(point);
mp.addOverlay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("运行了"+count+"次");
}
</script>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.1&services=true"></script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
// 创建地图对象并初始化
var mp = new BMap.Map("map_container");
var point = new BMap.Point(116.404, 39.915);
mp.centerAndZoom(point, 14);
// 内存性能测试
var count = 0;
function createInfo() {
mp.clearOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束,一共运行"+count+"次。");
}
createMarkers();
}
function createMarkers(){
var bounds = mp.getBounds();
var lngSpan = bounds.maxX - bounds.minX;
var latSpan = bounds.maxY - bounds.minY;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new BMap.Point(bounds.minX + lngSpan * (Math.random() * 0.7 + 0.15),
bounds.minY + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new BMap.Marker(point);
mp.addOverlay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("运行了"+count+"次");
}
</script>
</html>
谷歌marker：
代码
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script src="http://ditu.google.cn/maps?file=api&v=2&key=ABQIAAAAzr2EBOXUKnm_jVnk0OJI7xSosDVG8KKPE1-m51RBrvYughuyMxQ-i1QfUnH94QxWIa6N4U6MouMmBA&hl=zh-CN"
type="text/javascript"></script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
//谷歌地图初始化
var map = new GMap2(document.getElementById("map_container"));
map.setCenter(new GLatLng(39.917, 116.397), 14);
// 内存性能测试
var count = 0;
function createInfo() {
map.clearOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束"+count);
}
createMarkers();
}
function createMarkers(){
// 随机向地图添加 30 个标记
var bounds = map.getBounds();
var southWest = bounds.getSouthWest();
var northEast = bounds.getNorthEast();
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
for (var i = 0; i < 30; i++) {
count ++;
var latlng = new GLatLng(southWest.lat() + latSpan * Math.random(),
southWest.lng() + lngSpan * Math.random());
map.addOverlay(new GMarker(latlng));
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script src="http://ditu.google.cn/maps?file=api&v=2&key=ABQIAAAAzr2EBOXUKnm_jVnk0OJI7xSosDVG8KKPE1-m51RBrvYughuyMxQ-i1QfUnH94QxWIa6N4U6MouMmBA&hl=zh-CN"
type="text/javascript"></script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
//谷歌地图初始化
var map = new GMap2(document.getElementById("map_container"));
map.setCenter(new GLatLng(39.917, 116.397), 14);
// 内存性能测试
var count = 0;
function createInfo() {
map.clearOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束"+count);
}
createMarkers();
}
function createMarkers(){
// 随机向地图添加 30 个标记
var bounds = map.getBounds();
var southWest = bounds.getSouthWest();
var northEast = bounds.getNorthEast();
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
for (var i = 0; i < 30; i++) {
count ++;
var latlng = new GLatLng(southWest.lat() + latSpan * Math.random(),
southWest.lng() + lngSpan * Math.random());
map.addOverlay(new GMarker(latlng));
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
mapbar：
代码
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script type="text/javascript" src="http://union.mapbar.com/apis/maps/free?f=mapi&v=31.2&k=aCW9cItqL7sqT7AxaB0zdHZoZSWmbBsuT7JhMHTsMeD6ZIl9NzFsZHT=@JBL979@Iu7lJJZWWq0IDu9xZMzMxq7I9AhH7LAAA6hqzZHZZLTbZZauxlDz7C7DD9ZCFGT=">
</script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
//地图初始化
maplet = new Maplet("map_container");
maplet.centerAndZoom(new MPoint(116.38672,39.90805), 8);
maplet.addControl(new MStandardControl());
// 内存性能测试
var count = 0;
function createInfo() {
maplet.clearOverlays();
if (count > 3000) {
clearInterval(window._timer);
alert("测试结束"+count);
}
createMarkers();
}
function createMarkers(){
var lngSpan = 116.43683 - 116.29069;
var latSpan = 39.98916 - 39.88337;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new MPoint(116.29069 + lngSpan * (Math.random() * 0.7 + 0.15),
39.88337 + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new MMarker(
point,
new MIcon("http://union.mapbar.com/apidoc/images/tb1.gif",32,32)
);
maplet.addOverlay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none}
}
/*]]>*/</style>
<script type="text/javascript" src="http://union.mapbar.com/apis/maps/free?f=mapi&v=31.2&k=aCW9cItqL7sqT7AxaB0zdHZoZSWmbBsuT7JhMHTsMeD6ZIl9NzFsZHT=@JBL979@Iu7lJJZWWq0IDu9xZMzMxq7I9AhH7LAAA6hqzZHZZLTbZZauxlDz7C7DD9ZCFGT=">
</script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
//地图初始化
maplet = new Maplet("map_container");
maplet.centerAndZoom(new MPoint(116.38672,39.90805), 8);
maplet.addControl(new MStandardControl());
// 内存性能测试
var count = 0;
function createInfo() {
maplet.clearOverlays();
if (count > 3000) {
clearInterval(window._timer);
alert("测试结束"+count);
}
createMarkers();
}
function createMarkers(){
var lngSpan = 116.43683 - 116.29069;
var latSpan = 39.98916 - 39.88337;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new MPoint(116.29069 + lngSpan * (Math.random() * 0.7 + 0.15),
39.88337 + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new MMarker(
point,
new MIcon("http://union.mapbar.com/apidoc/images/tb1.gif",32,32)
);
maplet.addOverlay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
mapabc：
代码
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none;width:600px; height:500px;overflow:hidden;}
/*]]>*/</style>
<script type="text/javascript" src="http://app.mapabc.com/apis?&t=ajaxmap&v=2.1.2&key=b0a7db0b3a30f944a21c3682064dc70ef5b738b062f6479a5eca39725798b1ee300bd8d5de3a4ae3|29e8ed1f7f6a97d8e99fc568cea6a7dc0ccd920856e07c0718b9885faf7551a18141699c81f526d7">
</script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
var mapOptions = new MMapOptions();//构建地图辅助类
mapOptions.zoom=12;//要加载的地图的缩放级别
mapOptions.center=new MLngLat(116.36890411376953,39.913423004886866);//要加载的地图的中心点经纬度坐标
mapOptions.toolbar = DEFAULT;//设置地图初始化工具条
mapObj=new MMap("map_container",mapOptions); //地图初始化
// 内存性能测试
var count = 0;
function createInfo() {
mapObj.removeAllOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束");
}
createMarkers();
}
function createMarkers(){
var bounds = mapObj.getLngLatBounds();
myX = bounds.northEast.lngX - bounds.southWest.lngX;
myY = bounds.northEast.latY - bounds.southWest.latY;
for (var i = 0; i < 30; i ++) {
count ++;
var a = bounds.southWest.lngX + myX * (Math.random() * 0.7 + 0.15);
var b = bounds.southWest.latY + myY * (Math.random() * 0.7 + 0.15);
var markerOption = new MMarkerOptions();
markerOption.imageUrl="http://code.mapabc.com/images/lan_1.png";
Mmarker = new MMarker(new MLngLat(a,b),markerOption);
mapObj.addOverlay(Mmarker,true);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Marker 性能</title>
<style type="text/css">/*<![CDATA[*/
body{margin:0;padding:0;font-family:Times New Roman, serif}
p{margin:0;padding:0}
#wrapper{width:100%;margin:auto;text-align:left;height:100%}
#map_container{height:480px;margin:0}
#notes{position:absolute;right:10px;width:200px;top:10px}
@media print{
input{display:none}
#notes{display:none}
#map_container{margin:10px;border:none;width:600px; height:500px;overflow:hidden;}
/*]]>*/</style>
<script type="text/javascript" src="http://app.mapabc.com/apis?&t=ajaxmap&v=2.1.2&key=b0a7db0b3a30f944a21c3682064dc70ef5b738b062f6479a5eca39725798b1ee300bd8d5de3a4ae3|29e8ed1f7f6a97d8e99fc568cea6a7dc0ccd920856e07c0718b9885faf7551a18141699c81f526d7">
</script>
</head>
<body>
<div id="map_container"></div>
<div id="test_container">
<input type="button" onclick="test_mem()" value="mem_test" />
<input type="button" onclick="stop_mem()" value="stop_test" />
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
var mapOptions = new MMapOptions();//构建地图辅助类
mapOptions.zoom=12;//要加载的地图的缩放级别
mapOptions.center=new MLngLat(116.36890411376953,39.913423004886866);//要加载的地图的中心点经纬度坐标
mapOptions.toolbar = DEFAULT;//设置地图初始化工具条
mapObj=new MMap("map_container",mapOptions); //地图初始化
// 内存性能测试
var count = 0;
function createInfo() {
mapObj.removeAllOverlays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束");
}
createMarkers();
}
function createMarkers(){
var bounds = mapObj.getLngLatBounds();
myX = bounds.northEast.lngX - bounds.southWest.lngX;
myY = bounds.northEast.latY - bounds.southWest.latY;
for (var i = 0; i < 30; i ++) {
count ++;
var a = bounds.southWest.lngX + myX * (Math.random() * 0.7 + 0.15);
var b = bounds.southWest.latY + myY * (Math.random() * 0.7 + 0.15);
var markerOption = new MMarkerOptions();
markerOption.imageUrl="http://code.mapabc.com/images/lan_1.png";
Mmarker = new MMarker(new MLngLat(a,b),markerOption);
mapObj.addOverlay(Mmarker,true);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("计数器"+count);
}
</script>
</html>
51ditu:
代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>酸奶小妹——百度地图API学习</title>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<link rel="stylesheet" type="text/css" href="http://ui-love.com/baidumap/base.css" media="screen" />
<script language="javascript" src="http://api.51ditu.com/js/maps.js "></script>
</head>
<body>
<div class="wrapper">
<div class="header">
<h1>地图覆盖物内存优化测试--51地图API</h1>
<p><span class="f-r">2011-02-09</span>描述:</p>
<p>该测试为地图API的marker添加测试。请使用IE6浏览器，打开任务管理器，观察内存消耗变化。<br />
请点击地图下方的开始按钮，测试开始；点击暂停按钮，将观察到运行次数.<br />
一共运行5000次。
</p>
</div>
<div class="container clearfix">
<div class="f-l">
<div id="mapBox" class="myMap"></div>
<p>
<input type="button" onclick="test_mem()" value="开始" />
<input type="button" onclick="stop_mem()" value="暂停" />
</p>
</div>
<div class="f-r">
<img src="51ditu.jpg" alt="51ditu API覆盖物内存消耗" title="百51ditu API覆盖物内存消耗" />
<p>
本次测试全部采用IE6浏览器；<br />
本次测试的覆盖物全部采取随机方式创建；<br />
依次连续不间断做以上测试，不穿插其他测试；<br />
测试时间均为每1毫秒执行一次创建；<br />
测试期间，不新建其他进程。
</p>
</div>
</div>
<div class="info">
<p>谷歌广告:</p>
<div style="clear:both">
<script type="text/javascript"><!--
google_ad_client = "ca-pub-5845154460812025";
/* 横幅728*90 */
google_ad_slot = "8606107205";
google_ad_width = 728;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div>
</div>
<div class="footer">
<span class="f-r">COPYRIGHT © 酸奶小妹</span>
<span>友情链接:
<a target="_blank" href="http://openapi.baidu.com/map/index.html">百度地图API</a>|
<a target="_blank" href="http://tieba.baidu.com/f?kw=%B0%D9%B6%C8%B5%D8%CD%BCapi&fr=tb0_search&ie=utf-8">百度地图API贴吧</a>|
<a target="_blank" href="http://map.baidu.com/">百度地图</a>|
<a target="_blank" href="http://www.cnblogs.com/milkmap/">酸奶小妹</a>
</span>
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
// 创建地图对象并初始化
var mp = new LTMaps( "mapBox" );
mp.cityNameAndZoom( "beijing" , 5 );
// 内存性能测试
var count = 0;
function createInfo() {
mp.clearOverLays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束,一共运行"+count+"次。");
}
createMarkers();
}
function createMarkers(){
var bounds = new LTBounds(11630969 , 3979945,11650969 , 3999945);
var lngSpan = bounds.Xmax - bounds.Xmin;
var latSpan = bounds.Ymax - bounds.Ymin;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new LTPoint(bounds.Xmin + lngSpan * (Math.random() * 0.7 + 0.15),
bounds.Ymin + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new LTMarker(point);
mp.addOverLay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("目前运行了"+count+"次");
}
</script>
</html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>酸奶小妹——百度地图API学习</title>
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<link rel="stylesheet" type="text/css" href="http://ui-love.com/baidumap/base.css" media="screen" />
<script language="javascript" src="http://api.51ditu.com/js/maps.js "></script>
</head>
<body>
<div class="wrapper">
<div class="header">
<h1>地图覆盖物内存优化测试--51地图API</h1>
<p><span class="f-r">2011-02-09</span>描述:</p>
<p>该测试为地图API的marker添加测试。请使用IE6浏览器，打开任务管理器，观察内存消耗变化。<br />
请点击地图下方的开始按钮，测试开始；点击暂停按钮，将观察到运行次数.<br />
一共运行5000次。
</p>
</div>
<div class="container clearfix">
<div class="f-l">
<div id="mapBox" class="myMap"></div>
<p>
<input type="button" onclick="test_mem()" value="开始" />
<input type="button" onclick="stop_mem()" value="暂停" />
</p>
</div>
<div class="f-r">
<img src="51ditu.jpg" alt="51ditu API覆盖物内存消耗" title="百51ditu API覆盖物内存消耗" />
<p>
本次测试全部采用IE6浏览器；<br />
本次测试的覆盖物全部采取随机方式创建；<br />
依次连续不间断做以上测试，不穿插其他测试；<br />
测试时间均为每1毫秒执行一次创建；<br />
测试期间，不新建其他进程。
</p>
</div>
</div>
<div class="info">
<p>谷歌广告:</p>
<div style="clear:both">
<script type="text/javascript"><!--
google_ad_client = "ca-pub-5845154460812025";
/* 横幅728*90 */
google_ad_slot = "8606107205";
google_ad_width = 728;
google_ad_height = 90;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div>
</div>
<div class="footer">
<span class="f-r">COPYRIGHT © 酸奶小妹</span>
<span>友情链接:
<a target="_blank" href="http://openapi.baidu.com/map/index.html">百度地图API</a>|
<a target="_blank" href="http://tieba.baidu.com/f?kw=%B0%D9%B6%C8%B5%D8%CD%BCapi&fr=tb0_search&ie=utf-8">百度地图API贴吧</a>|
<a target="_blank" href="http://map.baidu.com/">百度地图</a>|
<a target="_blank" href="http://www.cnblogs.com/milkmap/">酸奶小妹</a>
</span>
</div>
</div>
</body>
<script type="text/javascript">
if (typeof console == "undefined"){
window.console = {
log: function(){
}
}
}
// 创建地图对象并初始化
var mp = new LTMaps( "mapBox" );
mp.cityNameAndZoom( "beijing" , 5 );
// 内存性能测试
var count = 0;
function createInfo() {
mp.clearOverLays();
if (count > 5000) {
clearInterval(window._timer);
alert("测试结束,一共运行"+count+"次。");
}
createMarkers();
}
function createMarkers(){
var bounds = new LTBounds(11630969 , 3979945,11650969 , 3999945);
var lngSpan = bounds.Xmax - bounds.Xmin;
var latSpan = bounds.Ymax - bounds.Ymin;
for (var i = 0; i < 30; i ++) {
count ++;
var point = new LTPoint(bounds.Xmin + lngSpan * (Math.random() * 0.7 + 0.15),
bounds.Ymin + latSpan * (Math.random() * 0.7 + 0.15));
var marker = new LTMarker(point);
mp.addOverLay(marker);
}
}
function test_mem() {
window._timer = setInterval(createInfo, 10);
}
function stop_mem() {
clearInterval(window._timer);
alert("目前运行了"+count+"次");
}
</script>
</html>
附图：
双林寺大雄宝殿一角，对比过多家寺庙，才能发现双林寺的与众不同。当之无愧的“世界文化遗产”！
