The Green Metrics Tool (GMT) has long supported automated generation of the Software Carbon Intensity (SCI) metric — the Green Software Foundation’s standard for expressing carbon emissions per unit of useful work. With the latest release, we have introduced Custom Metrics with per-phase SCI support, enabling developers to not just obtain a single SCI score for an entire benchmark run, but to decompose that score across the individual execution phases of their application. [...]

TL;DR The Green Metrics Tool now has a Yearly Run Simulation view that projects any run's measured energy against the average yearly carbon intensity of every Electricity Maps grid zone, for 2021 – 2025. Pick a year, energy metric, phase and number of runs — get a sortable table of estimated emissions per zone, plus renewable and carbon-free energy share. Pin zones side-by-side to compare regions and years at a glance, instead of relying on a single, falsely precise CO2 number. [...]

Websites also do have carbon emissions. Like any other digital product that our society creates. You might know already of other tools like Website Carbon Calculator, CO2.js, Cardamon or Firefox Profiler We have thought it would be great to integrate both functionalities, measuring emissions based on network transfer AND emissions based on an actually measured device energy consumption, into an easily accessible, highly configurable and free and open source solution. [...]

We’re excited to announce a new feature in the Green Metrics Tool: first-class Playwright support. Playwright is a widely used framework for end-to-end browser automation and testing. Many teams rely on it to ensure their web applications work as expected. Until now, running Playwright scripts with the Green Metrics Tool meant using the Docker Playwright container and manually mounting scripts. With this update, Playwright is now a native usage scenario type, making it far easier to measure the environmental impact of real browser interactions. [...]

We have gotten pretty good at measuring the emissions from things like computing, storage and memory usage, because the hardware is right in front of us. But when it comes to network traffic, things get murky. [...]

Green Metrics Tool has been certified with the Blue Angel for Software Label Big news: Our Green Metrics Tool just now also physically received the Blue Angel ecolabel for software after getting certified in 2024! That makes us one of just three software products in Germany to get this recognition — alongside Nextcloud Server and KDE’s Okular. [...]

Why measuring AI matters TL;DR Avoid high energy costs and emissions by comparing models before rolling them out at scale. Learn how to benchmark AI models for energy use using simple tools like Ollama and the Green Metrics Tool. Follow a real-world case study where smarter model selection led to resource savings. Get a ready-to-use setup for measuring inference performance on your own GPU or with our hosted cluster. [...]

Measuring the resource consumption of software is quite a complex topic. When we started working on the Green Metrics Tool we couldn’t imagine the ride this would take us on. From studying the Linux Kernel to building out own cluster. While this is needed to get accurate readings this is often too much work for a quick check what is going on. So we started to think about what such a tool needed to do. While I was developing our power logging solution for macOS, the PowerHog I really came to like the simplicity of the macOS powermetrics program. You can just fire it up and get per process energy metrics. You could pipe it into sed/awk and get fairly good data really easily. Even Windows has something similar. So does no tool like this exists under Linux? [...]

Please find the english version below Wir freuen uns, dass unser Green Metrics Tool nun mit dem renommierten Blauer Engel für Ressourcen- und Energieeffiziente Softwareprodukte ausgezeichnet wurde. Diese Zertifizierung unterstreicht unser Engagement für Nachhaltigkeit und Innovation in der Softwareentwicklung. [...]

A friend recently sent me a news headline in which a company is promoting that they will use their servers 15 years. While this initially sounds like a great idea, once you think about it, for a little while, you realize modern servers are far more energy efficient than old ones. This got me thinking, when is the point where the energy efficiency of the modern server outweighs the embodied carbon of the new machine. The more I thought about this the more I went down the rabbit hole. What if, the servers are powered with solar. How do I account for this? What are the servers doing? If the server is doing a lot of vector calculations a new one with a H100 card might make sense. How are they cooled? A modern server will surely produce less heat for the same operation. So it really depends on so many factors in the specific case that a general statement is hard to make. But I still wanted to get some sort of feeling. So I broke it down to the following inputs for the new and old machine: [...]