Here's a really interesting video about speed performance of the v8 engine: https://www.youtube.com/watch?v=aC_QLLilwso https://www.youtube.com/watch?v=aC_QLLi

Here's a really interesting video about speed performance of the v8 engine: https://www.youtube.com/watch?v=aC_QLLilwso https://www.youtube.com/watch?v=aC_QLLilwso The basic points: They watch functions for "hotness" (how often they are ran). Then, any function that is super hot, they'll see if it's being ran consistently (ie always receives two numbers as its arguments). Then they'll make a streamlined interpretation of the js code which only checks the arguments and then skips pretty much all the other checks. By doing this, it makes JS significantly faster. If you're trying to compare and contrast v8 to quickjs, this is the first thing that comes to mind for me as to what they may be doing differently.