Hang Shao has been an active contributor to the Eclipse OpenJ9 project since its inception [1]. He has been primarily working on the core runtime of the JVM. He is a recognized expert in class loading and Shared Classes Cache (SCC) technology. He has been involved in all the OpenJ9 releases with significant contributions to the new features including multi-layer SCC, default SCC, fat jar class sharing and startup hints sharing, which have improved OpenJ9’s performance on startup time and memory footprint. He has also made major contributions to the OpenJ9 implementation of JEP 371-Hidden Classes and JEP 390-Warning for Value-Based Classes.
Hang is currently leading the effort of project Valhalla [2] in OpenJ9. This project involves complex changes to almost all components of the JVM, including the interpreter, JIT, GC, JCL and tooling. Hang is mentoring junior developers and collaborating with contributors across multiple teams to ensure that the OpenJ9 implementation is compatible and up to date with the latest JVM specifications. His efforts include designing, writing, and reviewing the implementation as well as the test plan. He constantly collaborates with committers to ensure these Valhalla changes are accepted by OpenJ9.
Hang has been active in the OpenJ9 community activities. He regularly attends weekly community meetings and has given lightning talk on JEP371 [3]. He has provided timely responses to questions in his area of expertise in the OpenJ9 slack channel. He has authored 5 OpenJ9 blog posts introducing new features of OpenJ9 [4]. He has also reviewed and provided feedback to several OpenJ9 blog posts before the publication. Moreover, he has published several technical articles advertising the advanced features of OpenJ9 [5][6].
Hang has been very involved in the Eclipse OpenJ9 project. He has made 207 commits (20,722 ++ 57,801 --) to the project [7]. He has also mentored 5+ new contributors to the project. He has contributed his expertise to the project through comments/feedback in over 500 issues and pull requests [8].
[1] https://github.com/hangshao0
[2] https://openjdk.org/projects/valhalla/
[3] https://www.youtube.com/watch?v=xQP5MdFEIy4
[4] https://blog.openj9.org/tag/sharedclasses/
[5] https://dzone.com/articles/class-sharing-in-eclipse-openj9
[6] https://dzone.com/articles/class-sharing-in-eclipse-openj9-how-to-impro…
[7] https://github.com/hangshao0/openj9/graphs/contributors
[8] https://github.com/eclipse-openj9/openj9/issues?q=commenter%3Ahangshao0
It is my pleasure to nominate Hang as a committer on Eclipse OpenJ9™.
| Voter | Vote | Comments |
|---|---|---|
| Tobi Ajila | +1 | +1 implied by nomination |
| Dmitri Pivkine | +1 | |
| Babneet Singh | +1 | |
| Peter Shipton | +1 | |
| Daryl Maier | +1 | |
| Aleksandar Micic | +1 | |
| Adam Brousseau | +1 | |
| Irwin D'Souza | +1 | |
| Joran Siu | +1 | |
| Henry Zongaro | +1 | |
| Kazuhiro Konno | +1 | |
| Keith W. Campbell | +1 |
PMC Approval
- Gunnar Wagenknecht (+1) Welcome!