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Java 25's new CPU-Time Profiler

Learn all about Java 25's new CPU-time profiler and why it matters in this weeks blog post from the creator himself.

FR will use Linux’s CPU-timer mechanism to sample the stack of every thread running Java code at fixed intervals of CPU time. There are still many vague aspects included with this PR, as many has already pointed out, mostly related to the memory model and thread interactions – all those can, and should, be clarified, explained and exacted post-integration. In this talk, I’ll take you on my three-year journey to improve profiling, especially method sampling, with OpenJDK: from the initial ideas and problems of existing approaches to my different draft implementations and JEP versions, with all the setbacks and friends I made along the way.

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