JDK 1.1 Performance Enhancements
For JDK performance measurements, see Performance Measurements on the JavaSoft website.
- Interpreter Loop in Assembly Code on Win32 and Solaris/SPARC
Since portions of the Java VM have been rewritten in assembly
language, the resulting VM now runs up to five times faster on certain
- Non-Continuous Heap Support for Mac
Improved memory usage on Macintosh computers enables Java to run
more smoothly with other applications.
- Monitor Speedups
Synchronized methods enable operations to run more quickly and
- Garbage Collection of Classes
This enhancement automatically discards unused classes. Improved
overall VM memory usage enables Java to operate more efficiently, and with
- AWT Peer Class Re-Write for Win32
To achieve higher performance, AWT peer native classes have been
completely rewritten to be hosted running on top of Win32.
- JAR (Java Archive) bundling of resources for a single HTTP transaction
JAR is a new JDK 1.1 platform-independent file format that
aggregates many files into one. Java applets and their requisite
components--such as class files, images and sounds--can be bundled into a
compressed JAR file and downloaded to a browser in a single HTTP
transaction to reduce download time. In addition, applet authors can
digitally sign individual entries in a JAR file to authenticate their