Performance Analysis of React Applications: Optimization Methods and Tools

The article discusses the performance analysis of React applications.A research problem has been identified, which is that updating a tree is undesirable since updating a property at the top of the tree causes an update to all child components and elements.It is noted that with effective organization of system management, the development process can be significantly simplified and React application scalability can be ensured, which allows for effective management and reduction of the load on server resources.A review of the literature has been carried out that examines the analysis of React applications, various approaches that can be used in state management in web applications based on React, as well as software tools that make it possible to modernize the development process of web applications and websites through the use of third-party development tools in work, in particular, consideration was given to frameworks that represent the basis of many large web applications.Literature analysis showed that enough attention has been paid to performance analysis of React applications, while insufficient attention has been paid to optimization tools and methods.An overview of methods and tools that are designed to optimize a React application is presented.In this study, the following application optimization methods were considered: optimization of event handlers; using React.memo; using the React.Profiler API; virtualization of long lists; lazy loading of components; optimizing state updates using Immer; as well as the use of throttling and debouncing for input handlers.The conclusions drawn from the study will allow developers to quickly develop React applications without experiencing problems with their performance.