I just did one quick, changing the size of the string locally. private final String str = "This is a standard size string"; Time WriteUTF = 463 | Time WriteUTF = 356 | Time WriteUTF = 316 | Time WriteUTF = 350 | Time WriteUTF = 288 | Time readUTF = 580 | Time readUTF = 534 | Time readUTF = 541 | Time readUTF = 537 | Time readUTF = 536 | time NewUTF = 241 | time NewUTF = 237 | time NewUTF = 245 | time NewUTF = 245 | time NewUTF = 244 | spentTime readUTFNew = 340 | spentTime readUTFNew = 335 | spentTime readUTFNew = 334 | spentTime readUTFNew = 333 | spentTime readUTFNew = 337 | View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4211980#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...