Can you explain what the Shenandoah garbage collector engine is and how it works?

Shenandoah is a low-latency garbage collector for the JVM, designed to minimize pause times during garbage collection. Unlike traditional collectors that stop all application threads (stop-the-world) for extended periods, Shenandoah performs most of its work concurrently with the application's execution.

Key features:

• Parallel and incremental memory cleanup.
• Minimal pauses, typically within a few milliseconds.
• Uses marking and compaction algorithms without stopping the application.

This is especially useful for applications with high responsiveness requirements and low latency.