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Explore 13 concrete performance improvements introduced between JDK 21 and JDK 25 in this 51-minute conference talk from Devoxx. Discover how your unchanged application code can run faster with the latest JDK release, examining enhancements across standard Java libraries, the JIT compiler, and garbage collectors. Learn about the newly introduced "Stable Value" preview feature that allows fields to simultaneously benefit from both mutable and immutable characteristics, understanding its mechanics, performance gains, and practical implementation in current code. Delve into the design considerations behind these improvements, the critical role of developer feedback in JDK development, and how JDK engineers evaluate performance optimization in an environment with conflicting criteria and diverse platform properties.
