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- README
-
- Java Performance Pack for Win32
- Version 1.1.5 (Early-access release)
-
- -----------------------------------------------------------------------
- CONTENTS
-
- Overview of the Performance Pack
- System requirements
- Installing the Performance Pack
- Using the JIT compiler
- - Using the JIT compiler in conjunction with the JDK
- - Using the JIT compiler in conjunction with the JRE
- Uninstalling the JIT compiler
-
-
- -----------------------------------------------------------------------
- OVERVIEW OF THE JAVA PERFORMANCE PACK
- -----------------------------------------------------------------------
-
- The Java Performance Pack for Win32, version 1.1.5, contains an early-
- access version of a JIT compiler. When installed, the Performance
- Pack's JIT compiler should provide an increase in the speed with which
- your Java applications and applets run. In some cases, up to 10X
- improvement in performance can be realized.
-
- BECAUSE THIS IS A TECHNOLOGY PREVIEW RELEASE ONLY, THE PERFORMANCE
- PACK'S JIT COMPILER SHOULD NOT BE USED FOR MISSION-CRITICAL
- APPLICATIONS.
-
- If you encounter any problems or bugs with the Performance Pack,
- please report them via the JavaSoft bug submission web page at
- http://java.sun.com/cgi-bin/bugreport.cgi
-
-
- -----------------------------------------------------------------------
- SYSTEM REQUIREMENTS
- -----------------------------------------------------------------------
-
- The Performance Pack JIT compiler is available only for Win32
- platforms. The Performance Pack JIT compiler requires that JDK 1.1.5 or
- JRE 1.1.5 be installed on your machine. Note that JDK 1.1.5 and
- JRE 1.1.5 will not work on Windows NT 3.51.
-
-
- ----------------------------------------------------------------------
- INSTALLING THE PERFORMANCE PACK
- -----------------------------------------------------------------------
-
- To install the Performance Pack, double click on the Performance Pack
- file that you downloaded from the JavaSoft web site. This will open an
- InstallShield script that will step you through the installation
- process.
-
- Note that some browsers give you the option of executing the download
- file directly from the JavaSoft web site without saving a copy of the
- download file to your disk.
-
-
- -----------------------------------------------------------------------
- USING THE JIT COMPILER
- -----------------------------------------------------------------------
-
- USING THE JIT COMPILER IN CONJUNCTION WITH THE JDK --------------------
-
- To use the JIT compiler in conjuction with the JDK's java, javac or
- appletviewer command-line tools, you must set the JAVA_COMPILER
- environment variable to the value "symcjit". Use the following command
- from the DOS prompt:
-
- set JAVA_COMPILER=symcjit
-
- When the JAVA_COMPILER environment variable is set, the JIT compiler
- will be the default compiler invoked by the command-line tools.
-
- An alternative way of invoking the JIT compiler is to set the value of
- the java.compiler property to "symcjit". With the javac and
- appletviewer tools, you can do this as follows:
-
- appletviewer -J-Djava.compiler=symcjit MyApplet.html
- javac -J-Djava.compiler=symcjit MyApp.java
-
- When using the java command-line tool, you can set java.compiler as
- follows:
-
- java -Djava.compiler=symcjit MyApp
-
- If you don't want the JIT compiler to be invoked by default, unset
- the JAVA_COMPILER environment variable. You do this by setting
- JAVA_COMPILER to no value:
-
- set JAVA_COMPILER=
-
-
- USING THE JIT COMPILER IN CONJUNCTION WITH THE JRE --------------------
-
- If JRE 1.1.5 and the JIT compiler are both installed, the JIT compiler
- is the default compiler invoked by the jre command-line tool. If you
- want to run an application using only the default interpreter, without
- invoking the JIT compiler, you can use the jre command with the -nojit
- option.
-
-
- -----------------------------------------------------------------------
- UNINSTALLING THE JIT COMPILER
- -----------------------------------------------------------------------
-
- If for any reason you wish to uninstall the JIT compiler, you may do
- so from the Add/Remove Programs control panel of Windows 95/NT.
-
-
- -----------------------------------------------------------------------
- Copyright ⌐ 1997, 1998 Sun Microsystems, Inc.
- 901 San Antonio Road, Palo Alto, CA 94303-4900 USA
- All rights reserved.
-