Developers want more efficient software. Here’s what over 1000 GitHub users told us they need.

A survey of 1,039 U.S.-based GitHub users conducted by GitHub and Yale found substantial concern about climate change and AI’s environmental effects, alongside strong interest in tools, best practices, and measurements for making software more energy-efficient. Respondents reported greater concern about global warming than the broader U.S. adult population, although the opt-in marketing-email sample is not representative of all developers. The report argues that developers need practical, evidence-based ways to identify and reduce unnecessary computing through improvements in code, data access, network and I/O activity, and frontend performance, using metrics such as execution time, CPU use, memory allocation, and transfer size while acknowledging their limits. It recommends treating efficiency improvements as standard engineering work supported by reproducible benchmarks, tests, and clear discussion of trade-offs rather than unsupported environmental claims. GitHub’s open-source Daily Efficiency Improver, built with Agentic Workflows, is presented as a tool that can identify opportunities and create draft pull requests for human review, while maintainers retain responsibility for validating evidence and deciding whether changes are adopted.

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