In terms of raw performance, both Angular and React are incredibly fast. Angular has an advantage when it comes to initial page loading speed, as it uses server-side rendering. React, however, relies on the browser to render the UI and can be a bit slower in this regard. When it comes to runtime performance, React has the upper hand due to its virtual DOM. Angular uses two-way data binding which can be slower.
That being said, both frameworks can be optimized for speed and performance. React components can be optimized for better runtime performance, and Angular can be optimized for faster initial page load times. Ultimately, the decision of which framework to use depends on the needs of your project. If you need a fast initial page load, then Angular is the better choice. If you need a fast runtime performance, then React is the way to go.