Checking out JVM 12-16
summary
Covers JVM changes from 9 through 16 with concrete demos: Java Flight Recorder + Java Mission Control for profiling, application Class Data Sharing that drops startup from ~435 ms to under 300 ms in the demo, and low-pause collectors ZGC and Shenandoah that cut longest pauses from hundreds of milliseconds (G1/Parallel/CMS runs of ~14–21s) to sub-millisecond pauses (ZGC ~1.5 ms, Shenandoah ~0.5 ms) on the shown benchmark. Also lists records, text blocks, helpful NPEs, sealed classes, container awareness and removed CMS.
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chapters (8)
- 0:00Introduction and speaker intro
- 2:34Java release cycle and LTS
- 4:59Language changes in Java 9-16
- 8:51JVM changes and improvements
- 15:51Module system and backward compatibility
- 21:47Garbage collector demo
- 28:54Class data sharing demo
- 31:25Resources and closing remarks
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