Sustainability in IT - Yes, please!

Sustainable software development means achieving the same functionality with less CPU load, less main memory and less data transfer. Less resource consumption lowers power consumption, reduces cooling requirements in data centers and thus the CO2 footprint. Specific levers include image optimization on the web, targeted profiling in the backend and switching off unused processes.

Key Takeaways

• If you optimize an image of 3 megabytes by pixel reduction, quality adjustment and background blurring, you will save 86 kilobytes: a saving of around 97 percent with the same optical quality.
• More performant code consumes less CPU, generates less heat and therefore also reduces the amount of cooling required in the data center, which has a direct impact on the CO2 footprint and the cloud bill.
• Those who apply certain optimization patterns on a daily basis no longer need to measure them: With one person-week of effort, Carlos Fernandez was able to improve the startup of an application by 35 percent.
• Auto-refresh functions continue to run in the background, even if no user is looking at the window, and thus permanently generate unnecessary requests and resource consumption.
• Software can be controlled so that computationally intensive tasks run preferentially when, according to the API, there is a lot of green power available on the grid.

Efficiency meets ecology

In the latest episode of our podcast, we take a deep dive into the world of sustainability in software development. We show how performance optimization can not only improve the efficiency of software, but also make a significant contribution to environmental protection. Through concrete examples and practical tips, it becomes clear that every developer can make a difference with small changes in the code and in the development process.

A burning issue of our time: sustainability

In a world that is increasingly facing the effects of climate change, the topic of sustainability is more present than ever. And this topic is also becoming increasingly important in the IT industry. In this podcast episode, I have Carlos Fernandez as a guest, an experienced software developer and performance tester at DATEV eG, who has been passionately campaigning for more sustainability in IT for years. His mission: to make software development and the use of IT resources more environmentally friendly. Carlos shares his insights on how closely performance optimization and environmental protection are linked and how developers can make a positive contribution through conscious decisions.

The roots of sustainability in Carlos’ career

Carlos’ journey began over two decades ago in the world of software development. Early on, he recognized the importance of performance optimization - not only for the speed and efficiency of the software itself, but also for its environmental footprint. By working more efficiently, software requires fewer resources such as CPU time or memory space and thus indirectly contributes to reducing power consumption and therefore CO2 emissions. This realization led Carlos to view performance not just as a technical goal, but as an integral part of a more sustainable approach to IT.

Practical approaches for more sustainability

There are a variety of measures that companies and developers can take to make their IT processes more sustainable. From the choice of location for data centers to the optimization of energy consumption within the company - the possibilities are many. Carlos’ recommendations for developers are particularly interesting: from simple changes in the code to the use of specific tools to analyze performance. One impressive example is the optimization of web content, for example by adjusting image sizes or replacing JPEGs with more efficient image formats such as SVGs. These measures not only reduce data traffic and therefore energy consumption when loading websites, but can also lead to considerable cost savings.

Convince others - inside and outside the team

Despite his commitment, Carlos sometimes encounters challenges in convincing people within his company and in the developer community. But he remains tireless: through internal talks and active participation in communities, he tries to raise awareness of sustainable development and offer practical suggestions. It’s not just about writing more efficient code, but also about the bigger picture - the impact of our technological choices on the planet.

First steps towards sustainability for developers

So what can developers do to make their work more environmentally friendly? First of all, it is advisable to take stock: where is there potential for optimization? This could include simple measures such as reducing unnecessary requests on websites or adjusting image sizes. But more complex strategies such as profiling applications to identify inefficient sections of code also play a role. The goal is always the same: saving resources means saving energy - a direct path to greater sustainability in IT.

An appeal to all developers

Carlos’ message is clear: every individual can make a difference. By making conscious decisions in the design and development process, we have the power not only to improve our products, but also to make a positive contribution to protecting the environment. It’s about finding a balance between technological innovation and environmental responsibility - a goal that, while challenging, can ultimately be extremely rewarding both professionally and personally.