JVM - Profiling and GC analysis tool

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The easiest GC log analysis web site.
https://gceasy.io/

Profiling
Adding a JVM Option +XX:+PreserveFramePointer

https://github.com/jvm-profiling-tools/perf-map-agent
https://github.com/brendangregg/FlameGraph

$ perf-java-flames [pid]

https://github.com/Netflix/flamescope

Java - JFR create a new configuration from existing one

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Creating a new custom(custom.jfc) JFR configuration from the existing profile.jfc

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Nice example how Javascript can have a unit test with fetch call by mocking.

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Signal will be standard in JavaScript?

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LangChain JS example with Llama cpp for embeddings and prompt.