How JavaScript works: Optimizing the V8 compiler for efficiency Blog

Understanding how Javascript works is key to writing efficient Javascript. Forget about insignificant millisecond improvements: mis-using object properties can lead to a 7x slowdown of a simple one-liner. Given Javascript's ubiquity across all levels of the software stack (a la MEAN or replacements 1, 2, 3,) i nsignificant slowdowns can plague any if not all levels of your infrastructure - not just your website's menu animation.