Developing Performant, Cost Efficient, and Eco-friendly Code (#84)

Developing Performant, Cost Efficient, and Eco-friendly Code (#84)

From Foojay.io, the Friends Of OpenJDK! by Foojay.io

November 29, 2025 · 46 min · Season 5 · Episode 84

About this episode

The episode discusses developing sustainable software that is both performant and environmentally friendly, featuring insights from various experts in the field.

In this Foojay Podcast, we're exploring a critical topic that's becoming increasingly important in our industry: developing sustainable software that is both performant and environmentally friendly. At the Devoxx and JFall conferences, I had fascinating conversations about how we as Java developers can make a real impact on both our cloud costs and our carbon footprint. And it's interesting to learn how these two goals are often perfectly aligned: what's good for your budget is usually good for the planet too. We start with Daniel Witkowski. He published an article on Foojay that takes us on a deep dive into performance tuning. He explains why optimizing your code can have a thousand times more impact than saving 30% on cloud costs, and walks us through his journey of turning a simple integer validation challenge into a masterclass on Java performance optimization. Next, I caught up with Ko Turk, who shares his passion for sustainable engineering and space exploration. He introduces us to Kepler, a tool for monitoring the energy consumption of your applications, and explains how performance optimization naturally leads to sustainability improvements. Then Ronald Dehuysser…

People in this episode

Guests: Daniel Witkowski, Ko Turk, Ronald Dehuysser, Jan Ouwens

Topics covered

  • sustainable software
  • performance optimization
  • environmental impact
  • cloud costs
  • energy consumption
  • Java development

Keywords

  • sustainable engineering
  • Java performance
  • carbon footprint
  • cloud optimization
  • energy monitoring

Mentioned in this episode

Organizations: Foojay, JobRunr, Devoxx, JFall

Products: Kepler

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