Classes generally point you towards writing more performant code. Factory functions allow you to achieve the same performance, you just have to be a bit more ca

Classes generally point you towards writing more performant code. Factory functions allow you to achieve the same performance, you just have to be a bit more careful not to cause a depot :) For example, 1. field declarations [1] make sure that the fields are always initialized in the same order. That way most of your functions end up monomorphic, instead of being polymorphic [2] 2. Method declarations are also (almost) free, since you only pay for them once, during class initialization. You also get a few other niceties such as private properties. You can emulate private properties with closures in factory functions but V8 has a hard time optimizing, unfortunately. --- [1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes#class_body https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... [2]: https://www.builder.io/blog/monomorphic-javascript https://www.builder.io/blog/monomorphic-javascript