Stefan Marr

Full Professor (Universitätsprofessor)

Stefan Marr I head the Institute for System Software at the Johannes Kepler University Linz. My work focuses on programming language implementation techniques, compilation, complex concurrent systems, and tooling.

I am personally interested in making interpreters faster, detecting and preventing concurrency bugs at run time, and use modern language runtime systems to provide programmers with better tooling.

For contact details, please see my staff page.

Archive of posts from 2025

Oct 15, 2025: Can We Know Whether a Profiler is Accurate?

If you have been following the adventures of our hero over the last couple of years, you might remember that we can’t really trust sampling profilers for Java, and it’s even worse for Java’s instrumentation-based profilers.
Oct 1, 2025: First Day: A New Chapter at the JKU

It’s Wednesday. Is this important? It’s my first day in a new position. So, perhaps the real question is: what’s going to be important to me from now on?
Aug 27, 2025: How to Slow Down a Program? And Why it Can Be Useful.

Most research on programming language performance asks a variation of a single question: how can we make some specific program faster? Sometimes we may even investigate how we can use less memory. This means a lot of research focuses solely on reducing the amount of resources needed to achieve some computational goal.
Jul 31, 2025: It's Thursday, and My Last* Day at Kent

Today is the 31st of July 2025, and from tomorrow on I’ll be “between jobs”, or as Gen Z allegedly calls it, on a micro-retirement.

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