High Performance Back
JavaScript's original goal was to improve the user experience of web pages.
With high-speed connections more available than ever, web pages started becoming heavier, embedding more information and multimedia. But the problem is: JavaScript developers and web applications had evolved while the JavaScript engines had not.
Even if, Chrome with a V8 engine and other later engines have improved that situation, some performance problems are hard to optimize. That's why we, developers, should always pay more attention to the optimization of JavaScript.