Douglas Crockford returns to YUI Theater with another chapter in his evolving lecture series. This session, “Ajax Performance,” debunks common misconceptions about the relationship between JavaScript and performance and gives engineers a core focus for improving the performance of web apps: Reduce the value of n. Because DOM interactions are generally slow, leveraging Ajax to reduce the number of DOM operations, Douglas argues, is often the most important optmization you can make. In fact, it usually dwarfs other techniques in terms of its impact on the actual experience of using a website.

This talk joins an extensive library of Douglas’s lectures now available on YUI Theater, including his popular series on JavaScript.