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Setting and enforcing a JavaScript performance budget
Learn how to pick measurable JavaScript limits, translate them to build and runtime checks, and use tools and workflows that catch regressions before they reach users. This guide gives concrete…
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Case study for product teams: Is dark mode worth the energy savings on OLED and LCD devices
This case study shows how product teams can test whether dark themes produce meaningful device energy savings, how OLED and…
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Prioritize page weight cuts for biggest CO2 wins
Practical guidance showing which assets to remove or change first to reduce per visit carbon. Includes a simple decision framework,…
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Practical guide to web font performance and emissions with WOFF2, variable fonts and subsetting
This post explains which font delivery choices reduce network transfer and device work, and gives reproducible subsetting and deployment patterns…
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Measuring and Cutting Font Emissions with WOFF2, Variable Fonts and Subsetting
This article explains how font formats and delivery choices affect page weight and device work, how to measure the real…
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How to test whether dark mode saves device energy on OLED and LCD screens
Practical guidance for product and engineering teams to design reproducible tests that measure the real battery impact of dark themes…
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Brotli versus Gzip: HTTP Compression Choices that Cut Bytes and Carbon
This article explains how HTTP compression choices affect network transfer, server load and per visit carbon. Readers will learn when…
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Practical guide to sustainable image CDNs: smart resizing, caching and format negotiation
This guide explains how image CDN features such as edge resizing, format negotiation and caching interact with energy use and…
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What a Good Website Carbon Footprint Looks Like in 2026
This article shows how teams should interpret per visit website emissions in 2026, how to translate measurements into realistic targets…
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Page weight triage: what to remove first to cut page CO2 most effectively
A practical, prioritized guide that tells teams which page assets to remove or change first to achieve the largest reductions…