*What is Native Script? *
Native Script is a cross-platform mobile programming framework that is open-source. Also, Native Script is compatible with the Angular, Vue.js, and TypeScript frameworks. Developers have many creative options thanks to the variety of languages and technologies available.

What is React Native?
React Native is a free and open-source framework for creating cross-platform platforms such as mobile, web, desktop, and other platforms. Also, it is compatible with the Angular, Vue.js, and TypeScript frameworks. Developers have many creative options thanks to the variety of languages and technologies available.

In terms of performance, how does React Native stand out?

React Native has gotten a lot of negative reaction from the development community due to its performance. React Native is made of three components which are a native thread, a javascript thread, and a bridge that connects the two threads.

The native thread usually sends a message to the javascript thread via the bridge whenever a user starts a React Native application. The quantity of messages that the javascript thread can handle is limited, which is the primary reason for certain React Native applications' poor performance. As a result, when this limit is exceeded, the UI begins to slow. The application UI took longer than 16 milliseconds to render in some circumstances, causing the app to stutter.

The good news is that a React Native application's performance may be enhanced by employing workarounds and third-party tools like Proguard, which further optimizes bytecodes. Slowlog, for example, aids in the creation of performance timers that may be used to track and rectify performance issues.

*In terms of performance, how does NativeScript stand out?
*
NativeScript's performance expectations are neither high nor low; rather, they are in line with other cross-platform frameworks. NativeScipt animations run at 60 frames per second without problem. NativeScript apps are typically slower since the framework accesses native device APIs in a single-threaded manner. Furthermore, this framework allows for the offloading of some types of long-running operations in order to maintain a balanced frontend pace for quick performance. NativeScript uses a multiple-threading approach to enable offloading.

The application of certain best practices is also required for performance enhancement using this framework. Merging manual tool instrumentation to maximize performance and tracing of execution time within an application are two of these methods.

Thus, React Native and NativeScript each have their own set of features to prove its performance capacity. If you're still undecided about which option is ideal between React Native and NativeScript then an in depth article on React Native vs NativeScript might help.

Hope this helps!