The Influence of the Java Collection Framework on Overall Energy Consumption

TL;DR

This study analyzes the energy consumption of Java Collection Framework implementations and proposes an optimization approach that selects the most energy-efficient methods to reduce overall Java program energy use.

Contribution

It provides detailed energy profiles of JFC methods and introduces an optimization technique for selecting greener implementations in Java programs.

Findings

Identified the most energy-efficient JFC methods for different data sizes.

Developed an energy optimization approach based on method selection.

Achieved 6.2% energy savings in Java programs through optimization.

Abstract

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.