Investigation of performance overhead in cross-platform mobile frameworks (2020) [pdf](link.springer.com)
link.springer.com
Investigation of performance overhead in cross-platform mobile frameworks (2020) [pdf]
https://link.springer.com/content/pdf/10.1007/s10664-020-09827-6.pdf
The results was quite surprising for me. My expectation was that Flutter will be the best (after Native) followed by React Native.
I found other small benchmarks that shows Flutter is better on CPU-intensive tasks but React Native is better on typical UI side. I didn't found other useful benchmarks about NativeScript.