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MSR 2019
Sun 26 - Mon 27 May 2019 Montreal, QC, Canada
co-located with ICSE 2019
Sun 26 May 2019 14:45 - 15:00 at Centre-Ville - Session VI: Energy and Economics Chair(s): Maleknaz Nayebi

Over the last years, increasing attention has been given to creating energy-efficient software systems. However, developers still lack the knowledge and the tools to support them in that task. In this work, we explore our vision that energy consumption non-specialists can build software that consumes less energy by alternating, at development time, between third-party, readily available, diversely-designed pieces of software, without increasing the development complexity. To support our vision, we propose an approach for energy-aware development that combines the construction of application-independent energy profiles of Java collections and static analysis to produce an estimate of in which ways and how intensively a system employs these collections. By combining these two pieces of information, it is possible to produce energy-saving recommendations for alternative collection implementations to be used in different parts of the system. We implement this approach in a tool named CT+ that works with both desktop and mobile Java systems, and is capable of analyzing 40 different collection implementations of lists, maps, and sets. We applied CT+ to twelve software systems: two mobile-based, seven desktop-based, and three that can run in both environments. Our evaluation infrastructure involved a high-end server, a notebook, and three mobile devices. When applying the (mostly trivial) recommendations, we achieved up to 17.34% reduction in energy consumption just by replacing collection implementations. Even for a real world, mature, highly-optimized system such as Xalan, CT+ could achieve a 5.81% reduction in energy consumption. Our results indicate that some widely used collections, e.g., ArrayList, HashMap, and HashTable, are not energy-efficient and sometimes should be avoided when energy consumption is a major concern.

Sun 26 May
Times are displayed in time zone: (GMT-04:00) Eastern Time (US & Canada) change

14:45 - 15:30: MSR 2019 Paper Presentations - Session VI: Energy and Economics at Centre-Ville
Chair(s): Maleknaz NayebiPolytechnique Montréal
msr-2019-papers14:45 - 15:00
msr-2019-Data-Showcase15:01 - 15:07
Rui PereiraHASLab/INESC TEC & Universidade do Minho & Universidade da Beira Interior, Marco CoutoHASLab/INESC TEC & Universidade do Minho, João Paulo FernandesRelease/LISP, CISUC, Bruno Cabral, Hugo MatalongaUniversity of Minho, Simão Melo de Sousa, Fernando CastorFederal University of Pernambuco (UFPE)
msr-2019-Data-Showcase15:08 - 15:14
Rui RuaHASLab/INESC TEC & Universidade do Minho, Marco CoutoHASLab/INESC TEC & Universidade do Minho, João SaraivaUniversity of Minho, Portugal
msr-2019-papers15:15 - 15:21
Asher TrockmanUniversity of Evansville, Rijnard van TonderCarnegie Mellon University, Bogdan VasilescuCarnegie Mellon University
msr-2019-Data-Showcase15:22 - 15:28
Rijnard van TonderCarnegie Mellon University, Asher TrockmanUniversity of Evansville, Claire Le GouesCarnegie Mellon University