http://www.websiteoptimization.com/services/analyze/
这个在线的工具能够根据你给出的URL来计算出这个页面上的HTML、JS、CSS代码和图片各自的大小，
再计算出不同的带宽下的加载速度，最后给出一个建议，提示你哪部分该优化了。
如果你看到它的提示都是“Congratulations”证明你的网站性能还不错。
先看一下www.lemongtree.com的结果,不大理想 :(
Global Statistics
| Total HTTP Requests: |
29 |
| Total Size: |
100127 bytes |
Object Size Totals
| Object type |
Size (bytes) |
Download @ 56K (seconds) |
Download @ T1 (seconds) |
| HTML: |
45091 |
9.19 |
0.44 |
| HTML Images: |
29844 |
7.75 |
1.96 |
| CSS Images: |
6455 |
3.89 |
2.63 |
| Total Images: |
36299 |
11.64 |
4.59 |
| Javascript: |
18737 |
4.93 |
1.30 |
| CSS: |
0 |
0.00 |
0.00 |
| Multimedia: |
0 |
0.00 |
0.00 |
| Other: |
0 |
0.00 |
0.00 |
TOTAL_HTML - Congratulations,
TOTAL_OBJECTS - Warning!
TOTAL_IMAGES - Warning!
TOTAL_SIZE - Caution.
TOTAL_SCRIPT - Caution.
HTML_SIZE - Caution.
IMAGES_SIZE - Warning!
SCRIPT_SIZE - Warning!
MULTIM_SIZE - Congratulations