JavaScript bloat

>"In 1998, a complex JavaScript application was a few dozen lines of code. By 2008, leading-edge Web applications like Hotmail, Gmail, and CNN.com included hundreds of thousands of lines of JavaScript," said the Microsoft JavaScript team members, Shanku Niyogi, Amanda Silver, John Montgomery, Luke Hoban, and Steve Lucco. "Today, there are Web applications with a million lines of JavaScript. These Web applications look more and more like the applications we run on our desktops."

http://news.cnet.com/8301-30685_3-57330431-264/microsoft-shoots-down-googles-dart-language/

In the old days, desktop applications could at full speed run on computers with a few MHz of CPU speed and a few megabytes of RAM. Now, they require a few GHz of CPU speed and a many megabytes of RAM, because they're all written in JavaScript.