What is ACDS?
Before that, what is this class data sharing?
The Class Data Sharing was introduced first in JDK 5. It offers dynamic data sharing between multiple JVM which reduces start up time and memory footprint
Lets get started with a detailed video tutorial.
Application Class Data Sharing in Java 10
When JRE is installed, the installer creates a file 'Shared Archive' which is an internal representation of the classes from the system jar file.
On JVM start up, the shared archive is memory mapped among multiple JVM process.
JVM startup time reduced because restoring the shared archive is faster than loading classes.
Now, What is Application Class Data Sharing which is introduced in Java 10?
Java 10 extended the existing class data sharing to allow application classes to be placed in shared archive. The advantage is Great Memory Savings. The application class data sharing is one of the major changes in the Java 10. The Java 10 Performance improvement's major step is making the application classes also available for sharing between JVMs. Java 10 has many performance improvement JEP, and this is one of the best among them.
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