MattAlp

import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

public class ClassInit {
  static final int CLASSLOADERS = Integer.getInteger("classloaders", 3);
  static final int THREADS = Integer.getInteger("threads", 3);

  static class MyClassLoader extends URLClassLoader {
    public MyClassLoader() {

MattAlp

MattAlp

Advancing Java Profiling

(Slides)

• Advancing Java Profiling JavaOne 2025
• Advancing Java Profiling CZJUG Nov 2025

(Resources)

• CPU Flamegraphs
• Inner Workings of Safpoints
• Safepoints: Meaning, Side Effects and Overheads

MattAlp

require "llvm"

# Initialize LLVM.  There's also `LLVM.init_arm` if that's what you use.
LLVM.init_x86

# The context of everything we'll do.  Main book-keeping structure.
ctx = LLVM::Context.new

# Code can be separated in different modules.  A module can't directly interact
# with another module.  If you'd do that, you'd have to link them.