supabase.com

The numbers

First visit

0.286 g CO₂e

Return visit

0.0082 g CO₂e

Hosting

unknown

LCP

464 ms

CLS

n/a

TTFB

7 ms

At 10,000 views a month this page emits about 26.0 kg CO₂e a year, roughly 107 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 3%, and world-average grid intensity. How we calculate this

1. Reduce JavaScript payloadsave ~0.025 g/visit (221 kB)High impact · moderate effort

   79 scripts total 884 kB on the wire (2.93 MB decoded). Bundles this size usually carry a lot of unused code.

   Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.

   • 3167-96ba8dc81b042a2d.js107 kB
   • 54b60c1a.6bbda1b675d00c95.js70 kB
   • d0d393d5-cd06a51e85f11ccd.js68 kB
   • 5313-5b02a30fe46989d3.js65 kB
   • 84ae39ca-db4a5ea287046f08.js55 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
2. Lazy-load below-the-fold mediasave ~0.026 g/visit (235 kB)Medium impact · quick fix

   16 below-the-fold images/iframes (470 kB) download immediately for every visitor.

   Add loading="lazy" to below-fold img and iframe elements (and keep it off the LCP image). Browsers then fetch them only when scrolling approaches.

   • elliot-fleck-hyper.jpeg189 kB
   • vasek-mlejnsky.jpg91 kB
   • jian-mobbin.jpg90 kB
   • thiago-peres-rally.jpeg52 kB
   • caleb-peffer.jpg38 kB

   WSG 2.9: Optimize media to reduce resource use
3. Convert and compress imagessave ~0.025 g/visit (221 kB)Medium impact · quick fix

   8 images (492 kB) ship in legacy formats (JPEG/PNG/GIF).

   Serve AVIF (or WebP) with responsive srcset sizes, and re-compress oversized files. AVIF typically halves JPEG weight at the same visual quality.

   • elliot-fleck-hyper.jpeg189 kB
   • vasek-mlejnsky.jpg91 kB
   • jian-mobbin.jpg90 kB
   • thiago-peres-rally.jpeg52 kB
   • caleb-peffer.jpg38 kB

   WSG 2.9: Optimize media to reduce resource use
4. Serve images at the size they displaysave ~0.0033 g/visit (30 kB)Medium impact · quick fix

   5 images are encoded at more than twice the pixels the layout shows, even accounting for this viewport's pixel density.

   Generate multiple sizes and let the browser pick with srcset/sizes; a 4000px original behind a 400px slot spends bandwidth no screen displays.

   • elliot-fleck-hyper.jpeg189 kB
   • vasek-mlejnsky.jpg91 kB
   • jian-mobbin.jpg90 kB
   • thiago-peres-rally.jpeg52 kB
   • image16 kB

   WSG 2.9: Optimize media to reduce resource use
5. 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
6. Upgrade compression beyond gzipsave ~0.017 g/visit (155 kB)Advisory · quick fix

   1.03 MB 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.

   • 3167-96ba8dc81b042a2d.js107 kB
   • 54b60c1a.6bbda1b675d00c95.js70 kB
   • d0d393d5-cd06a51e85f11ccd.js68 kB
   • 3e40bad259b2f932.css67 kB
   • 5313-5b02a30fe46989d3.js65 kB

   WSG 4.3: Reduce data transfer with compression
7. Optimize web fontssave ~0.0067 g/visit (60 kB)Advisory · quick fix

   5 font files total 170 kB.

   Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.

   • e4af272ccee01ff0-s.p.woff249 kB
   • e4af272ccee01ff0-s.p.woff249 kB
   • 4c9affa5bc8f420e-s.p.woff225 kB
   • 4c9affa5bc8f420e-s.p.woff225 kB
   • 443896d591e4f761-s.p.woff222 kB

   WSG 2.11: Use optimized web typography
8. Remove references to broken resourcessave ~0.0018 g/visit (16 kB)Advisory · quick fix

   2 requests answered 4xx/5xx on load: transfer and connections spent on nothing, on every single visit.

   Delete or fix the references (stale asset URLs, dead third-party tags). Each one is a request the page provably does not need.

   • dashboardHTTP 404 · 3.6 kB
   • docsHTTP 404 · 12 kB

   WSG 4.4: Setup necessary error pages and redirection links
9. Set a page-weight budgetAdvisory · moderate effort

   At 1.93 MB per view this page rates D. The findings above list where the weight is.

   Agree a transfer budget (e.g. under 975 kB reaches a B), enforce it in CI, and re-scan after each change to hold the line.

   WSG 3.1: Set goals based on performance and energy impact
10. Simplify the document structureAdvisory · larger effort

    The page renders 7555 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

• JavaScript884 kB · 79 req
• Images535 kB · 28 req
• Fonts170 kB · 5 req
• CSS124 kB · 10 req
• Data (fetch)118 kB · 20 req
• HTML92 kB · 1 req
• Data (XHR)6.9 kB · 1 req
• Other0 B · 7 req