Java 24 removes synchronized pinning. Why are virtual threads still slow?

Java 24 has introduced a significant change: virtual threads no longer pin carrier threads within synchronized blocks. This eliminates a critical performance bottleneck that developers faced when adopting virtual threads. However, despite this improvement, many applications still experience latency. The article analyzes what remains a bottleneck in modern Java applications and why traditional performance diagnostic methods are becoming less effective. The author examines new approaches to monitoring and JVM tuning required for the efficient use of virtual threads under high load. Developers are encouraged to rethink their resource management and profiling strategies to identify hidden causes of performance degradation in the updated Java runtime environment.