ブラウザ書き忘れた。

http://life7.2ch.net/test/read.html/lifesaloon/1162569075/
CPU:p4 3.0GHz Mem DDR400 CL3 dualch. 2GB

IE　6.0.2800.1106
一回目　elapsed time: 2.109 sec.
二回目　elapsed time: 1.766 sec.
三回目　elapsed time: 1.937 sec.

firefox 2.0
elapsed time: 2.187 sec
elapsed time: 1.907 sec.
elapsed time: 1.797 sec.

opera 9.02
elapsed time: 1.375 sec.
elapsed time: 1.469 sec.
elapsed time: 1.562 sec.