Server User Manual

TuningYour Application
This chapter provides information on tuning applications for maximum performance. A
complete guide to writing high performance Java and Java EE applications is beyond the scope
of this document.
This chapter discusses the following topics:
■
“Java Programming Guidelines” on page 27
■
“Java Server Page and Servlet Tuning” on page 29
■
“EJB Performance Tuning” on page 32
Java Programming Guidelines
This section covers issues related to Java coding and performance. The guidelines outlined are
not specic to Enterprise Server, but are general rules that are useful in many situations. For a
complete discussion of Java coding best practices, see the
Java Blueprints.
Avoid Serialization and Deserialization
Serialization and deserialization of objects is a CPU-intensive procedure and is likely to slow
down your application. Use the transient keyword to reduce the amount of data serialized.
Additionally, customized readObject() and writeObject() methods may be benecial in
some cases.
Use StringBuer to Concatenate Strings
To improve performance, instead of using string concatenation, use StringBuffer.append().
String objects are immutable—they never change after creation. For example, consider the
following code:
2
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