Apple today released a new update for Safari Technology Preview, the experimental browser that was first introduced in March ...

However, it is set to get even faster with the new Javascript rendering engine interpreter that the Webkit group says is 1.6 times faster than WebKit s previous interpreter.

To enable JavaScript, go into the Settings app on your iPhone, click "Safari," then "Advanced," and swipe the JavaScript button to the right so it appears green. Here's a full breakdown with pictures.