There are many frameworks available in the IT environment that differ in performance, security, complexity, and speed. The user who wants to start working with the selected framework should know whether it will meet the architectural requirements and business assumptions. The aim of this work is to compare the performance and complexity of web applications built using different lightweight frameworks for the Java language. Spring Boot, Micronaut, Quarkus and Javalin frameworks will be compared. At the beginning of the work, the main problems related to the creation of modern applications were discussed. In the following sections, basic analysis of the complexity of the syntax and conventions of the selected skeletons was performed. Then, ex...