What speed are we talking about if react is the same js?

Question

React

I watched the video and for some reason they compare the speed of React, Angular and other analogs, this is javascript, what is the speed?
Maybe I do not understand something, tell me please.

Answer 1

same js?

For some reason, a Ferrari is faster than a Cossack, although the material is the same - metal, rubber, etc.
If closer to the topic, a particular framework implements a certain algorithm that allows you to optimize: the execution time of the key code / the amount of code / complexity, etc., providing an acceptable result.
Also, each framework has its own pain points, for example, with a certain use, the algorithms of the framework can be very overhead and have a negative effect.

Answer 2

react and other solutions are layers of abstraction on top of the language. it's not the same thing.