The Green Shift: Transitioning .NET Services Across Architectures • Sara Bergman • GOTO 2025

This presentation was recorded at GOTO Copenhagen 2025. #GOTOcon #GOTOcph
https://gotocph.com

Sara Bergman - Co-Author of "Building Green Software" & Software Engineer at Microsoft @sarabergman1396 

RESOURCES
https://bsky.app/profile/saraemilybergman.bsky.social
http://twitter.com/SaraEbergman
https://github.com/SaraEmilyBergman
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Links
https://ourworldindata.org/energy
https://ourworldindata.org/electricity-mix
https://blog.cloudflare.com/designing-edge-servers-with-arm-cpus
https://amperecomputing.com/assets/amadeus_case_study_8794122fe5.pdf
https://azure.microsoft.com/en-us/blog/azure-cobalt-100-based-virtual-machines-are-now-generally-available
https://cloud.google.com/blog/products/compute/introducing-googles-new-arm-based-cpu
https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-9
https://devblogs.microsoft.com/dotnet/performance-improvements-in-net-9/#arm64
https://learn.microsoft.com/en-us/dotnet/core/compatibility/sdk/6.0/path-x64-emulated
https://github.com/danielmarbach/beyondsimplebenchmarks
https://blogs.windows.com/windowsdeveloper/2025/04/14/github-actions-now-supports-windows-on-arm-runners-for-all-public-repos
https://github.blog/news-insights/product-news/arm64-on-github-actions-powering-faster-more-efficient-build-systems

ABSTRACT
As the tech industry faces increasing pressure to reduce its environmental footprint, software engineers are well positioned to drive change—not just through efficient code, but by making smarter architectural choices.

This talk is a practical guide for engineers looking to port .NET services across architectures, particularly toward ARM-based platforms, to unlock energy efficiency and performance gains.

We’ll walk through the real-world journey of moving services from traditional x86 and x64 to ARM, highlighting the common roadblocks and how to overcome them.

This session is not just about theory—it’s a how-to for engineers who want to make their services greener without sacrificing quality or velocity. Whether you're working on microservices, APIs, or backend systems, you’ll leave a notion of what to watch out for and a clear understanding of the potential wins—both for your service and the planet. [...]

TIMECODES
00:00 Intro
01:28 What makes software green?
06:00 Energy efficiency
08:09 CPU: RISC vs. CISC
11:36 Why should you change?
13:49 The green wins
17:46 Hardware efficiency
24:49 The migration journey
42:01 Takeaways
42:27 Outro

Download slides and read the full abstract here:
https://gotocph.com/2025/sessions/3745

RECOMMENDED BOOKS
Anne Currie, Sarah Hsu, & Sara Bergman • Building Green Software • https://amzn.to/3IKopW5
Ioannis Kolaxis • 101 Green Software • https://www.kolaxis.dev/book-green-software
Bill Gates • How to Avoid a Climate Disaster • https://amzn.to/4iWtvPI
Mehdi Khosrow-Pour • Green Computing Strategies for Competitive Advantage and Business Sustainability • https://amzn.to/2YXbI7j
Lässig, Kersting & Morik • Computational Sustainability • https://amzn.to/3APBW8r
Zbigniew H. Gontar • Smart Grid Analytics for Sustainability and Urbanization • https://amzn.to/3pkRVsS
Katsoni & Segarra-Oña • Smart Tourism as a Driver for Culture and Sustainability • https://amzn.to/2YXfPQM
Carola Lilienthal • Sustainable Software Architecture • https://amzn.to/3yFXxoS

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