Micro Benchmark Tests on "long" Operations

This chapter provides tutorial notes and example codes on micro benchmark tests on 'long' data type operations. Topics include empty loop, assignment loop, add operation, multiplication operation and division operation.

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"long" Empty Loop: 15 Nanoseconds per Step

"long" Assignment Only: 17 Nanoseconds per Step

"long" Shift and Assignment: 20 Nanoseconds per Step

"long" Add and Assignment: 20 Nanoseconds per Step

"long" Multiply and Assignment: 20 Nanoseconds per Step

"long" Division and Assignment: 26 Nanoseconds per Step

Performance Comparisons between "int" and "long"

Comparison of "Long" Loops between Windows 7 and XP


Table of Contents

 About This Book

 JVM (Java Virtual Machine) Specification

 Java HotSpot VM - JVM by Oracle/Sun

 java.lang.Runtime Class - The JVM Instance

 java.lang.System Class - The Operating System

 ClassLoader Class - Class Loaders

 Class Class - Class Reflections

 JVM Runtime Data Areas

 JVM Stack, Frame and Stack Overflow

 Thread Testing Program and Result

 CPU Impact of Multi-Thread Applications

 I/O Impact of Multi-Thread Applications

 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

 OpenJ9 by Eclipse Foundation

 JRockit JVM 28.2.7 by Oracle Corporation

 Archived Tutorials


 Full Version in PDF/EPUB