3 Search Results for "Choi, Jong-Deok"

Document
DOI: 10.4230/LIPIcs.ECOOP.2025.19
Profile-Guided Field Externalization in an Ahead-Of-Time Compiler

Authors: Sebastian Kloibhofer, Lukas Makor, Peter Hofer, David Leopoldseder, and Hanspeter Mössenböck

Published in: LIPIcs, Volume 333, 39th European Conference on Object-Oriented Programming (ECOOP 2025)

Abstract
Field externalization is a technique to reduce the footprint of objects by removing fields that most frequently contain zero or null. While researchers have developed ways to bring this optimization into the Java world, these have been limited to research compilers or virtual machines for embedded systems. In this work, we present a novel field externalization technique that uses information from static analysis and profiling to determine externalizable fields. During compilation, we remove those fields and define companion classes. These are used in case of non-default-value writes to the externalized fields. Our approach also correctly handles synchronization to prevent issues in multithreaded environments. We integrated our approach into the modern Java ahead-of-time compiler GraalVM Native Image. We conducted an evaluation on a diverse set of benchmarks that includes standard and microservice-based benchmarks. For standard benchmarks, our approach reduces the total allocated bytes by 2.76% and the maximum resident set size (max-RSS) by 2.55%. For microservice benchmarks, we achieved a reduction of 6.88% for normalized allocated bytes and 2.45% for max-RSS. We computed these improvements via the geometric mean. The median reductions are are 1.46% (alloc. bytes) and 0.22% (max-RSS) in standard benchmarks, as well as 3.63% (alloc. bytes) and 0.20% (max-RSS) in microservice benchmarks.
Cite as

Sebastian Kloibhofer, Lukas Makor, Peter Hofer, David Leopoldseder, and Hanspeter Mössenböck. Profile-Guided Field Externalization in an Ahead-Of-Time Compiler. In 39th European Conference on Object-Oriented Programming (ECOOP 2025). Leibniz International Proceedings in Informatics (LIPIcs), Volume 333, pp. 19:1-19:32, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2025)

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@InProceedings{kloibhofer_et_al:LIPIcs.ECOOP.2025.19,
  author =	{Kloibhofer, Sebastian and Makor, Lukas and Hofer, Peter and Leopoldseder, David and M\"{o}ssenb\"{o}ck, Hanspeter},
  title =	{{Profile-Guided Field Externalization in an Ahead-Of-Time Compiler}},
  booktitle =	{39th European Conference on Object-Oriented Programming (ECOOP 2025)},
  pages =	{19:1--19:32},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-373-7},
  ISSN =	{1868-8969},
  year =	{2025},
  volume =	{333},
  editor =	{Aldrich, Jonathan and Silva, Alexandra},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2025.19},
  URN =		{urn:nbn:de:0030-drops-233121},
  doi =		{10.4230/LIPIcs.ECOOP.2025.19},
  annote =	{Keywords: compilation, instrumentation, profiling, fields, externalization, memory footprint reduction, memory footprint optimization}
}
Document
Invited Talk
DOI: 10.4230/LIPIcs.ECOOP.2015.2
Programming in the Large for the Internet of Things (Invited Talk)

Authors: Jong-Deok Choi

Published in: LIPIcs, Volume 37, 29th European Conference on Object-Oriented Programming (ECOOP 2015)

Abstract
The term Internet of Things (IoT) has generated a lot of buzz in the information technology and consumer electronics industries. In the IoT setting, a large number of physically dispersed devices - such as sensors, actuators and processing units - coordinate to bring useful capabilities to the user. A significant portion of these devices may have rather small computation and storage footprints, but at the same time, they can leverage support from potential enormous computation and storage resources via the cloud. Also, a large set of small footprint devices can serve not just a single logical app or service, but also many independent logical apps or services. This requires a careful separation of computational activities and their associated data within a device, for privacy and security purposes. Application development for the Internet of Things gives a whole new meaning to the term "programming in the large", and some of this is likely to be new to the practitioner. This talk will discuss what the IoT environment means to the practical programmer, and what apps and app ecosystems for IoT might look like. The talk will also discuss the issues and open challenges in software engineering brought on by this new environment, pointing towards new opportunities for researchers in our community.
Cite as

Jong-Deok Choi. Programming in the Large for the Internet of Things (Invited Talk). In 29th European Conference on Object-Oriented Programming (ECOOP 2015). Leibniz International Proceedings in Informatics (LIPIcs), Volume 37, p. 2, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2015)

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@InProceedings{choi:LIPIcs.ECOOP.2015.2,
  author =	{Choi, Jong-Deok},
  title =	{{Programming in the Large for the Internet of Things}},
  booktitle =	{29th European Conference on Object-Oriented Programming (ECOOP 2015)},
  pages =	{2--2},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-86-6},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{37},
  editor =	{Boyland, John Tang},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2015.2},
  URN =		{urn:nbn:de:0030-drops-52132},
  doi =		{10.4230/LIPIcs.ECOOP.2015.2},
  annote =	{Keywords: software development methodologies, software architecture, programming model, software engineering, IoT}
}
Document
DOI: 10.4230/DagSemRep.405
Understanding Program Dynamics (Dagstuhl Seminar 03491)

Authors: Jong-Deok Choi, Barbara G. Ryder, and Andreas Zeller

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Jong-Deok Choi, Barbara G. Ryder, and Andreas Zeller. Understanding Program Dynamics (Dagstuhl Seminar 03491). Dagstuhl Seminar Report 405, pp. 1-6, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2003)

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@TechReport{choi_et_al:DagSemRep.405,
  author =	{Choi, Jong-Deok and Ryder, Barbara G. and Zeller, Andreas},
  title =	{{Understanding Program Dynamics (Dagstuhl Seminar 03491)}},
  pages =	{1--6},
  ISSN =	{1619-0203},
  year =	{2003},
  type = 	{Dagstuhl Seminar Report},
  number =	{405},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemRep.405},
  URN =		{urn:nbn:de:0030-drops-152854},
  doi =		{10.4230/DagSemRep.405},
}
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