How to optimize the performance of using Jakarta Standard Tag Library API

How to optimize the performance of using Jakarta Standard Tag Library API Overview: Jakarta Standard Tag Library (JSTL) is a standard labeling library to develop Javaseerver Pages (JSP) for common logic and functions on the JSP page.When using the labels and functions provided by JSTL, in order to improve performance, we can take some optimization measures. Here are some suggestions for optimizing the performance of using Jakarta Standard Tag Library API: 1. Avoid duplicate expression (Expressions): In JSTL, we can use expressions to access and operate data.Repeated expressions may lead to decline in performance.To avoid this, the result of the expression can be stored in the variable and the variable can be reused when needed. Example code: <c:set var="data" value="${expression}" /> 2. Avoid using complex expressions in the cycle: Using complex expressions in the cycle may lead to repeated calculations and additional overhead.In order to improve performance, it is necessary to calculate and store any complex expressions before the cycle, and use the storage results in the cycle. Example code: <c:set var="result" value="${complexExpression}" /> <c:forEach items="${collection}" var="item"> <c:out value="${result}" /> </c:forEach> 3. Limit the use of labels: JSTL provides multiple labels, and each label increases additional overhead.When using JSTL, the number of tags should be limited to avoid unnecessary labels as much as possible. 4. Use static reference: In JSTL, static references can be used to avoid repeated expenses of obtaining objects.Static references can be created using `<C: Set>` tags, and reused when needed. Example code: <c:set var="request" value="${pageContext.request}" scope="page" /> 5. Use EL cache: JSTL uses expression language (EL) to obtain and operate data.The EL cache is a technology that caches the calculation result of EL expression to improve performance.When using JSTL, the number of calculations of expression can be reduced by enable EL cache. You can add the following code to the top of the JSP page to enable the EL cache: <%@ page isELIgnored="false" %> Summarize: By avoiding repeated expressions, avoiding the use of complex expressions in the cycle, using the use of static references and enabling EL cache in the cycle, the performance of the use of Jakarta Standard Tag Library API can be improved.These optimization measures can reduce unnecessary calculation expenses and improve the execution efficiency of JSTL.