Dipl.-Ing. Dr. Lukas Makor, BSc.

Research

Research Interests

• Compilers (AOT, JIT, IRs, Optimizations)
• Performance & Memory Optimization
• Virtual Machines
• Memory and Performance Monitoring & Profiling
• Software Visualization

Projects

GraalVM

• Automated Columnar Arrays in GraalVM JavaScript (JavaScript runtime of GraalVM) (2021-2023)
  
• Automated Profile-Guided Replacement of Data Structures in GraalVM Native Image (Ahead-of-Time Compilation of Java Byte Code) (2023-2024)
  
• Automated Profile-Guided Field Externalization in GraalVM Native Image (2024-2025)
  

AntTracks - Memory Monitoring Tool

• Configurable Heap Memory Visualization Over Time (2018)
  
• Memory Cities: Visualizing Heap Memory Evolution Using the Software City Metaphor (2019)
  
• Memory Leak Analysis using Time-Travel-based and Timeline-based Tree Evolution Visualizations (2019-2020)
  

Presentations

• MPLR 2022:
  Automatic Array Transformation to Columnar Storage at Run Time.
  19th Intl. Conf. on Managed Programming Languages and Runtimes (MPLR'22), September 14-15, 2022, Brussels, Belgium
  
  
• SPLASH 2021: [Extended Abstract, Poster]
  Run-Time Data Analysis in Dynamic Runtimes
  Doctoral Symposium, Intl. Conf. on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'21), October 17-22, 2021, Virtual
  
  
• SPLASH 2021: [Extended Abstract, Poster]
  Run-Time Data Analysis in Dynamic Runtimes
  Student Research Competition, Intl. Conf. on Systems, Programming, Languages, and Applications: Software for Humanity (SPLASH'21), October 17-22, 2021, Virtual
  
  
• VMM 2021:
  Program Optimization using Data Analysis
  2021 Virtual Machine Meetup (VMM 2021), September 30, 2021, Virtual
  
  

Publications

• Sebastian Kloibhofer, Lukas Makor, Peter Hofer, David Leopoldseder, Hanspeter Mössenböck:
  Profile-Guided Field Externalization in an Ahead-of-Time Compiler.
  European Conference on Object-Oriented Programming (ECOOP'25), 30 June - 4 July, 2025, Bergen, Norway (accepted for publication)
  
  
• Lukas Makor, Sebastian Kloibhofer, Peter Hofer, David Leopoldseder, Hanspeter Mössenböck:
  Automated Profile-Guided Replacement of Data Structures to Reduce Memory Allocation.
  The Art, Science, and Engineering of Programming, 2025, Vol. 10, Issue 1, Article 3
  Presentation at the <Programming> Conference 2025, Jun 02-06, 2025, Prague, Czech Republic
  
  
• Sebastian Kloibhofer, Lukas Makor, David Leopoldseder, Daniele Bonetta, Lukas Stadler, Hanspeter Mössenböck:
  Control Flow Duplication for Columnar Arrays in a Dynamic Compiler.
  The Programming Journal, vol. 7, issue 3, article 9, February 2023, pp.1-38
  Presentation at the <Programming> Conference 2023, March 13-17, 2023, Tokyo, Japan
  
  
• Lukas Makor, Sebastian Kloibhofer, David Leopoldseder, Daniele Bonetta, Lukas Stadler, Hanspeter Mössenböck:
  Automatic Array Transformation to Columnar Storage at Run Time.
  19th Intl. Conf. on Managed Programming Languages and Runtimes (MPLR'22), Brussels, Sept. 14-15, 2022, pp.16-28
  
  
• Sebastian Kloibhofer, Lukas Makor, David Leopoldseder, Daniele Bonetta, Lukas Stadler, Hanspeter Mössenböck:
  Automatically Transforming Arrays to Columnar Storage at Run Time.
  Poster, 19th Intl. Conf. on Managed Programming Languages and Runtimes (MPLR'22), Brussels, Sept. 14-15, 2022, pp.16-28
  
  
• Lukas Makor:
  Run-Time Data Analysis in Dynamic Runtimes.
  SPLASH Doctoral Symposium at SPLASH'21, Oct. 17-22, 2021, Chicago, IL, USA
  
  
• Lukas Makor:
  Run-Time Data Analysis in Dynamic Runtimes.
  ACM Student Research Competition at SPLASH'21, Oct. 17-22, 2021, Chicago, IL, USA, pp.9-12
  3rd place in the graduate category
  
  
• Markus Weninger, Lukas Makor, Hanspeter Mössenböck:
  Memory Leak Analysis using Time-Travel-based and Timeline-based Tree Evolution Visualizations.
  7th Conference on Smart Tools and Applications in Graphics (STAG'20), November 12 - 13, 2020, Online, pp.1-13 (Best Paper Award).
  
  
• Markus Weninger, Lukas Makor, Hanspeter Mössenböck:
  Heap Evolution Analysis Using Tree Visualizations.
  11th Symposium on Software Performance (SSP'20) - published in GI Softwaretechnik-Trends, November 12 - 13, 2020, Leipzig, Germany, Paper no.6.
  
  
• Markus Weninger, Lukas Makor, Hanspeter Mössenböck:
  Memory Cities: Visualizing Heap Memory Evolution Using the Software City Metaphor - Artifact (Binaries, Data Sets, Video, Instructions).
  8th IEEE Working Conference on Software Visualization (VISSOFT'20), 28-29 September, 2020, Adelaide, Australia (moved online) (Successful Artifact Evaluation)
  
  
• Markus Weninger, Lukas Makor, Hanspeter Mössenböck:
  Memory Cities: Visualizing Heap Memory Evolution Using The Software City Metaphor.
  8th IEEE Working Conference on Software Visualization (VISSOFT'20), 28-29 September, 2020, Adelaide, Australia (moved online), pp.110-121 (Best Paper Award)
  
  
• Markus Weninger, Lukas Makor, Hanspeter Mössenböck:
  Memory Leak Visualization using Evolving Software Cities
  10th Symposium on Software Performance (SSP'19) - published in GI Softwaretechnik-Trends, November 4 - 6, 2019, Würzburg, Germany.
  
  
• Markus Weninger, Lukas Makor, Elias Gander, Hanspeter Mössenböck:
  AntTracks TrendViz: Configurable Heap Memory Visualization Over Time
  WIP paper, 10th ACM/SPEC Intl. Conf. on Performance Engineering (ICPE'19), April 7-11, 2019, Mumbai, India, pp.29-32.
  
  

Teaching

Courses

• Übung zu Softwareentwicklung 1: 2021W, 2022W, 2023W, 2024W
• Übung zu Softwareentwicklung 2: 2021S, 2022S, 2023S, 2024S, 2025S

Supervised Bachelor's Theses