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Energy Efficiency across Programming Languages: How Do Energy, Time, and Memory Relate?, Pereira, Rui, Couto Marco, Ribeiro Francisco, Rua Rui, Cunha Jácome, Fernandes João P., and Saraiva João , 10th ACM SIGPLAN International Conference on Software Language Engineering (SLE’17), 23-24 October, Vancouver, Canada, (2017) paper.pdf
The Influence of the Java Collection Framework on Overall Energy Consumption, Pereira, Rui, Couto Marco, Saraiva João, Cunha Jácome, and Fernandes João P. , 5th International Workshop on Green and Sustainable Software (ICSE 2016), 15-21, p.–, (2016) Abstractgreens.pdf

This paper presents a detailed study of the energy consumption of the different Java Collection Framework (JFC) implementations. For each method of an implementation in this framework, we present its energy consumption when handling different amounts of data. Knowing the greenest methods for each implementation, we present an energy optimization approach for Java programs: based on calls to JFC methods in the source code of a program, we select the greenest implementation. Finally, we present preliminary results of optimizing a set of Java programs where we obtained 6.2% energy savings.

User-Friendly Spreadsheet Querying: An Empirical Study, Pereira, Rui, Saraiva João, Cunha Jácome, and Fernandes João P. , 31st Annual ACM Symposium on Applied Computing (SAC'16), Smart Human Computer Interaction Track, Poster Paper, Pisa, Italy, (2016) sac-hci16.pdf
Helping Programmers Improve the Energy Efficiency of Source Code (Abstract/Poster), Pereira, Rui, Carção Tiago, Couto Marco, Cunha Jácome, Fernandes João P., and Saraiva João , Proceedings of the 39th International Conference on Software Engineering (ICSE 2017), Buenos Aires, Argentina, (2017) paper.pdfpostera3.pdf