A Deep Dive into JVM Start-up

Explores the intricate startup sequence of the Java Virtual Machine, from command invocation through JNI_CreateJavaVM() to class loading, linking, and initialization. Covers system resource detection, garbage collector selection (G1 GC by default), Class Data Sharing (CDS), metaspace creation, and the three-phase class linking process (verification, preparation, resolution). Discusses optimization techniques including Project Leyden's Ahead-of-Time compilation features in JDK 24, which aims to reduce startup time by performing class loading and linking operations ahead of time rather than at runtime.