How Expensive is Thread.getStackTrace()?

Question

In a logging system, every log output is done by a helper class with a method such as this one

public void debug(String message) {
    Logger logger = Logge         


        

Answer 1

Now with JDK 9 & 10, you can use StackWalker, which is not an expensive call.

private void invoke006() {
        var stack = StackWalker.getInstance(StackWalker.Option.SHOW_HIDDEN_FRAMES).walk((s) -> s.collect(Collectors.toList()));
        stack.forEach(stackFrame -> {
            if (stackFrame.getMethodName().equals("masterInvoker")) {
                System.err.println("master called !!");
                System.err.println(StackWalker.getInstance().walk((s) -> s.collect(Collectors.toList())).get(0).getMethodName() + ", line: " + StackWalker.getInstance().walk((s) -> s.collect(Collectors.toList())).get(0).getLineNumber());
            }
        });
    }