I feel a bit uneasy about the current trends that can be applied to JavaScript. Working on the benchmark, I see that the vector of ECMAScript development can go the way of lodash or jQuery. I don't like this at all, because it is clear how this "optimization" hits performance. Imagine if a lot of people just started using forEach instead of for , and then people would be given more functions like that, and then the applications would be even slower. The concept of "making code more concise and easier" baffles me, because I see forEach, map and similar methods being slower than the implementation via a regular for. I would like to see this trend introduced carefully.