November 2017
Intermediate to advanced
398 pages
10h 14m
English
Content preview from Java 9 High Performance
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Storing interned strings in CDS archives
The main goal of this feature is to reduce memory footprint caused by creating new instances of String in every JVM process. All the classes that are loaded in any JVM process can be shared with other JVM processes via Class Data Sharing (CDS) archives.
Oh, I did not tell you about CDS. I think it's important to spend some time to understand what CDS is, so you can understand the underlying performance improvement.
Many times, small applications in particular spend a comparatively long time on startup operations. To reduce this startup time, a concept called CDS was introduced. CDS enables sharing of a set of classes loaded from the system JAR file into a private internal representation during the ...