This is a story of a bug I had an opportunity to fix in the ancient times of node.js 0.10. The new and shiny node.js 0.12 was still just glimmering somewhere on the horizon, we were still young and beautiful. Some of us, at least. Let me take you on an adventure through time and space. Hopefully, there will be some learning involved along the way. So hop on the magic school bus and we’re off!

There is a belief among many developers that JavaScript is very slow, and writing more code in it than it’s necessary may adversely affect the performance. I guess it’s partially true. Incompetent use of this language can indeed decrease the quality of the project and the performance itself. However, JavaScript is one of the most developing languages.I’ll show you a few examples that will prove that JavaScript engines do what they can to speed up your code. In my work I focus on Google’s open source Java...