Hello, I am writing a series of articles about current JavaScript engines and techniques they use to improve JavaScript performance. In an introductory article of the series I am trying to explain the readers why fast JavaScript execution is a problem and where the biggest performance hurdles lie. I have some (hopefully educated) guesses, but I am very interested in opinions of the JavaScript engine developers. What are the most problematic areas or language features when trying to write a fast JavaScript implementation? Thanks for your answers in advance. David Majda -- Everyone gets everything he wants. --Captain Willard in Apocalypse Now Personal :: david@majda.cz :: www.majda.cz Work :: david.majda@impaladesign.cz :: www.impaladesign.cz