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Core Servlets and Javaserver Pages

By Hall, Marty

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Book Id: WPLBN0000691242
Format Type: PDF eBook
File Size: 10.24 MB.
Reproduction Date: 2005
Full Text

Title: Core Servlets and Javaserver Pages  
Author: Hall, Marty
Language: English
Subject: Recreation, Leisure, Recreation areas
Collections: Technical eBooks Collection
Publication Date:


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Hall, M. (n.d.). Core Servlets and Javaserver Pages. Retrieved from

Technical Reference Publication

Excerpt: With traditional CGI, a new process is started for each HTTP request. If the CGI program itself is relatively short, the overhead of starting the process can dominate the execution time. With servlets, the Java Virtual Machine stays running and handles each request using a lightweight Java thread, not a heavyweight operating system process. Similarly, in traditional CGI, if there are N simultaneous requests to the same CGI program, the code for the CGI program is loaded into memory N times. With servlets, however, there would be N threads but only a single copy of the servlet class. Finally, when a CGI program finishes handling a request, the program terminates. This makes it difficult to cache computations, keep database connections open, and perform other optimizations that rely on persistent data. Servlets, however, remain in memory even after they complete a response, so it is straightforward to store arbitrarily complex data between requests.


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