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Root cause seems to be that a different ExpressionFactory is used ( .ExpressionFactoryImpl in 2.3.0+ instead of .ExpressionFactoryImpl in 2.2.x). Please assume that the process will be running on port 80 as an unprivileged user. However, I have seen many people suggest that using Apache + Tomcat gives you better security and protection against attacks. with Tomcat or Glassfish for a cheap application server component. Tomcat's web site says it is better to use stand alone Tomcat for speed if you are not clustering. At least in our HTML frontend it is common that we only set model attributes in certain cases, and the JSPs/tags then check whether they are set, so accesses to non-existing attributes happen very frequently, which leads to noticeable performance problems. Connection pooling is a performance benefit because only a few database connections. When properties that do exist are accessed, there is no performance difference between the different Spring Boot versions.
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memory issues Create and deploy microservices Java EE 8 High Performance.
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This significantly slows down the EL expression evaluation, since the 4 lookups for each attribute take a few milliseconds on an idle machine. Tomcat, and Glassfish servers for Java EE application development Use JSP. This happens once per unique attribute on each request (or per JSP/tag context) accessing the same attribute again in the same context does not lead to additional class lookups. and no such attribute is defined in the view model), there are class loader calls to find the classes " java.lang.", " rvlet.", " ." and " .". Starting with Spring Boot 2.3.0, the following happens: For each non-existing attribute accessed during Spring EL expression evaluation on a JSP (for example, when using $ or. free, open-source, high-performance HTTP server and reverse proxy. This problem seems to affect all current versions of Spring Boot 2.3.x (2.3.0 to 2.3.7) and 2.4.x (2.4.0 and 2.4.1), but not 2.2.x. Find the top-ranking alternatives to Apache Tomcat based on 950 verified user reviews. We have noticed that JSP EL expression evaluation has become significantly slower when non-existing attributes are accessed, starting with Spring Boot 2.3.0.