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CarbonlessBeta

Carbon report

news.ycombinator.com/item?id=49686380

Scanned · all pages on news.ycombinator.com

0.049 g

cleaner than an estimated 93.9% of pages on the web 

  1. A+
  2. A
  3. B
  4. C
  5. D
  6. E
  7. F

A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.

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What the browser rendered, so you can confirm a real page was measured.

The numbers

329 kBcold load, on the wire
61 domains
0 B0 requests
324 kB98% re-downloaded
0.049 g CO₂e
0.048 g CO₂e
unknown
1.73 s
n/a
159 ms

At 10,000 views a month this page emits about 5.8 kg CO₂e a year, roughly 24 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 98%, and world-average grid intensity. How we calculate this

What to fix

apply everything → ~0.041 g/visit, rating A

  1. Verify your hosting energyMedium impact · moderate effort

    This host has not published renewable energy evidence with the Green Web Foundation, so its energy source is unknown.

    Choose a provider listed in the Green Web Directory, or ask your current provider to publish evidence (and a carbon.txt). This cuts the data-center share of every single page view.

    • carbon.txtNo carbon.txt found at the site root; publishing one is the lightest first step.
    WSG 4.1: Use sustainable hosting
  2. Upgrade compression beyond gzipsave ~0.0073 g/visit (49 kB)Advisory · quick fix

    328 kB of text ships gzip-compressed; Brotli or Zstandard would cut roughly another 15-20%, and browsers without them fall back to gzip automatically.

    Serve precompressed Brotli for static text assets (highest level, compressed at build time) and enable Brotli or zstd for dynamic responses; keep gzip only as the fallback.

    • item324 kB
    • hn.js2.2 kB
    • news.css2.0 kB
    WSG 4.3: Reduce data transfer with compression
  3. Simplify the document structureAdvisory · larger effort

    The page renders 39721 DOM elements, above the 1,500 guideline. Large trees cost memory and CPU on every visitor's device.

    Flatten wrapper markup, render long lists virtually or paginate, and prefer semantic elements over nested divs.

    WSG 3.6: Ensure code follows good semantic practices

Where the bytes are

  • HTML324 kB · 1 req
  • JavaScript2.2 kB · 1 req
  • CSS2.0 kB · 1 req
  • Images1.1 kB · 3 req
Ten heaviest requests
ResourceTypeWire sizeCache-Control
news.ycombinator.com/item?id=49686380document324 kBprivate; max-age=0
news.ycombinator.com/hn.js?wCNqQJIYy0KyNICRHsdDscript2.2 kBmax-age=314818962, public
news.ycombinator.com/news.css?wCNqQJIYy0KyNICRHsdDstylesheet2.0 kBmax-age=314276937, public
news.ycombinator.com/y18.svgimage512 Bmax-age=229255756, public
news.ycombinator.com/triangle.svgimage327 Bmax-age=228601321, public
news.ycombinator.com/s.gifimage234 Bmax-age=184762876, public

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<a href="https://carbonless.cc/report/news.ycombinator.com/item%3Fid%3D49686380"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fnews.ycombinator.com%2Fitem%3Fid%3D49686380" alt="Carbon rating for this page" width="150" height="30" loading="lazy" /></a>

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