JDK 1.1 Performance Enhancements - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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 operations.
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 efficiently.
Garbage Collection of Classes
This enhancement automatically discards unused classes. Improved overall VM memory usage enables Java to operate more efficiently, and with less memory.
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 origin.