1:性能

stackflow:http://stackoverflow.com/questions/1910794/what-is-the-difference-between-jquery-text-and-html

demo:http://jsfiddle.net/PhJNX/

• jQuery's .html() is ~2x faster than .text().
• pure JS' .innerHTML is ~3x faster than .html().
• pure JS' .nodeValue is ~50x faster than .html(), ~100x than .text(), and ~20x than .innerHTML.

2:安全

stackflow:http://stackoverflow.com/questions/9735045/is-jquery-text-method-xss-safe

demo:http://jsfiddle.net/TLu69/

$().text()更安全