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Can someone explain the differences between GraalVM and Jvm-Hotspot, and how GraalVM is related to OpenJDK's HotSpot.
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It turned out that GraalVM is a bit faster overall than HotSpot but there are some outliers to the left, i.e. some problems where we can observe a severe performance degradation. The native image, however, is 50% slower on average (in terms of moves per second) than HotSpot.
GraalVM is a tool for developers to write and execute Java code. Specifically, GraalVM is a Java Virtual Machine (JVM) and Java Development Kit (JDK) created by Oracle. It is a high-performance runtime that provides improvements in application performance and efficiency.
Run Java FasterGraalVM takes over the compilation of Java bytecode to machine code. In particular for other JVM-based languages such as Scala, this configuration can achieve benefits, as for example experienced by Twitter running GraalVM in production.
GraalVM native executables can run faster than Scala/Java/JVM applications, with much less memory consumption.
In that context you could think of GraalVM as a modified/improved HotSpot JVM [very loosely: OpenJDK's HotSpot + the Graal JIT Compiler (replacing the one from HotSpot) + the ability to run other languages (JS, Ruby, R, Python, etc.) + ability to AOT compile Java + additional bundled tools, etc.]
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Detailed information about how Graalvm performs better than standard Hotspot and how to use it: https://www.baeldung.com/graal-java-jit-compiler
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GraalVM is a JVM with multiple change:
The graal project also have a Substrate VM which is a framework to build native artifact from Java.
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