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JVM Internals Deep Dive 8-25 LTS
- JVM Architecture Overview — runtime data areas, memory model, flag reference table
- Class Loading Subsystem — delegation model, loading phases, JPMS/Jigsaw module system
- Execution Engine & JIT — tiered compilation levels (0→4), inlining, escape analysis, loop vectorisation, SIMD intrinsics, speculative optimisation and deoptimisation
- Garbage Collection Algorithms — deep dives on G1, ZGC (coloured pointers, load barriers, concurrent relocation), and Shenandoah; full comparison table across all collectors
- LTS-by-LTS Optimisation History:
- GC Configuration & Tuning — selection guide, essential flags, unified GC logging
- Monitoring & Profiling — JFR, jcmd/jstack/async-profiler, key production metrics
- Virtual Threads & Modern Concurrency — VT vs platform threads, migration checklist, StructuredTaskScope pattern
- Performance Tuning Playbook — symptom→root cause table, AppCDS, CRaC, GraalVM Native
- Evolution Timeline — Java 8→25 at a glance
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By Prabuddha Ganegoda- JVM Architecture Overview — runtime data areas, memory model, flag reference table
- Class Loading Subsystem — delegation model, loading phases, JPMS/Jigsaw module system
- Execution Engine & JIT — tiered compilation levels (0→4), inlining, escape analysis, loop vectorisation, SIMD intrinsics, speculative optimisation and deoptimisation
- Garbage Collection Algorithms — deep dives on G1, ZGC (coloured pointers, load barriers, concurrent relocation), and Shenandoah; full comparison table across all collectors
- LTS-by-LTS Optimisation History:
- GC Configuration & Tuning — selection guide, essential flags, unified GC logging
- Monitoring & Profiling — JFR, jcmd/jstack/async-profiler, key production metrics
- Virtual Threads & Modern Concurrency — VT vs platform threads, migration checklist, StructuredTaskScope pattern
- Performance Tuning Playbook — symptom→root cause table, AppCDS, CRaC, GraalVM Native
- Evolution Timeline — Java 8→25 at a glance