If anyone of you guys have access to Vue mastery watch the tutorial where Evan creates a mini-version of Vue js in vanilla JS in like 15 minutes.

He also explains some of the Vue optimization tricks like why they ditched the nested JSON and how Vue caches the @click handlers, etc so they don't need to check this on every digest cycle.

I wish there was a free version to link here. Really interesting stuff, shows you how much thought and effort is put in by the creators to optimise so many little things which us users of the framework never even notice is happening.