Faster, leaner, greener: 10x lower website carbon emissions with Thibaud Colas
summary
Quantitative audit of thousands of Django sites yields 120,000 tons for 50,000 sites and frames a 90% (10x) reduction target; deep dive on djangoproject.com uses performance testing, power measurement and static analysis to show real fixes: 95% lighter YouTube embed, responsive and recompressed images (JPEG‑reencode, AVIF), dark theme cutting display power 11W vs 4W on OLED, static exports and serverless/SQLite options, Eco grader and Firefox power profiler for measurements, and region shifts that can cut hosting emissions dramatically.
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chapters (15)
- 0:00Introduction
- 1:04Digital sustainability context
- 3:53Goal: 10x lower emissions
- 4:38System boundaries in web emissions
- 6:24User devices dominate emissions
- 7:48Frontend optimizations
- 9:56Dark mode energy savings
- 11:24Image optimization techniques
- 13:51Responsive images savings
- 15:17Static vs dynamic energy use
- 17:04Backend emissions in Django
- 18:08Serverless over-provisioning
- 18:51Hosting location impact
- 20:18AI model carbon footprint
- 21:00Next steps and resources
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