JVM Tutorials - Herong's Tutorial Examples

∟StringBuffer Testing Program and Result

∟StringBuffer Testing Result with JDK 1.6.0

This section describes thread test results with JDK 1.6.0.

After installing JDK 6u2, I tested the StringBuffer program again on a Windows XP system. Here are the results.

JVM                    Capacity   Capacity   Capacity   Capacity
                       Default    237        320        640

HotSpot 1.6.0 Client   454        313        328        344
HotSpot 1.6.0 Server   407        291        297        312

The results still show that higher initial capacities slow down the performance slightly.

Last update: 2007.

Table of Contents

 About This Book

 Download and Install Java SE 1.6 Update 2

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 Sun's JVM - Java HotSpot VM

 JRockit JVM 7.0 by BEA Systems

 JRockit JVM 8.0 by BEA Systems

 Memory Management Rules and Tests

 Garbage Collection Tests

 Stack Overflow Tests

 Thread Testing Program and Result

►StringBuffer Testing Program and Result

 StringBuffer Testing Program

►StringBuffer Testing Result with JDK 1.6.0

 CDS (Class Data Sharing)

 Micro Benchmark Runner and JVM Options

 Micro Benchmark Tests on "int" Operations

 Micro Benchmark Tests on "long" Operations

 Micro Benchmark Tests in JIT Compilation Mode

 Micro Benchmark Tests on "float" and "double" Operations

 References

 PDF Printing Version