servlet response time is slow for first request

问题

Servlet response time slow only for 1st request

Response time

1st request is 10.5 seconds.

further request 2.5 seconds.

From few java resources i got to know that the servlet loads the required classes for the first time during the first request and reuses the same for further requests and hence the delay

Fix 1: I created a dummy request within the servlet immediately after the execution of init() method.

Response time : 2.5 seconds for all requests through user agents.

Fix 2: I tried loading possible classes in the startup of servlet

Response time : for first request is 6 seconds. 2.5 seconds for other requests.

Is there are any other possibility of achieving the same because i believe that method 1 needs code change when there is a change in the url of the application (port number, resource path, etc) and response time of method 2 is not sufficient.

I have already set loadOnStartup=1 for my servlet.

回答1:

you can also use load-on-startup param in web.xml to load and intitiliaze your servlet on starttime.

<servlet>
    <servlet-name>MyServlet</servlet-name>
    <display-name>My Servlet</display-name>
    <servlet-class>com.foo.MyServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
</servlet>  

来源：https://stackoverflow.com/questions/36548778/servlet-response-time-is-slow-for-first-request