METHODS FOR INCREASING THE PERFORMANCE OF THE LIBRARY'S PROGRESSIVE WEB APPLICATION BASED ON THE RAIL MODEL

Abstract

The article examines the directions of digital transformation of the library sphere and substantiates the approaches aimed at optimizing the productivity of electronic libraries. The purpose of the article is to study the methods of improving the performance of a progressive web application of the library during its development using the RAIL useroriented performance optimization model. Research methods. General scientific methods of analysis and synthesis, methods of developing progressive web applications and methods of optimizing their performance, based on the assessment of architectural solutions from the point of view of their impact on the speed of the application, are used. The scientific novelty of the research consists in identifying, in the conditions of modern digital transformation of the library sphere, methods of increasing the productivity of the library web application adapted to work on various hardware and software platforms - a progressive web application that combines the properties of a web application and a native application. Conclusions. The use of modern digital information processing systems requires a review of approaches to the selection of web application architectures that libraries use as platforms for interacting with readers, and to determining their performance. To ensure cross-platform compatibility and the possibility of working with library resources in offline mode, the expediency of developing a library web application using PWA technology, whose architecture includes an Web App Manifest, Service Workers and Application Shell, was found. The study of methods for improving the performance of the progressive web application of the library allowed to determine the application strategy in the process of its development of performance optimization methods in accordance with the requirements of the RAIL model: compressing the size of images and specifying their dimensions in an explicit way through attributes; JavaScript code reduction – by optimizing functions and splitting long tasks into tasks with a duration of no more than 50ms by implementing asynchronous code; implementation of smooth animation using CSS5 with processing of each frame up to 10 ms; grouping tasks that are performed in the background into blocks of no more than 50 ms.