www.craigslist.org/area/leipzig

The numbers

First visit

0.113 g CO₂e

Return visit

0.0048 g CO₂e

Hosting

unknown

LCP

2.18 s

CLS

1.158

TTFB

104 ms

At 10,000 views a month this page emits about 10.3 kg CO₂e a year, roughly 42 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 4%, and world-average grid intensity. How we calculate this

1. Audit third-party servicessave ~0.042 g/visit (375 kB)High impact · moderate effort

   2 third-party domains account for 750 kB (99% of the page).

   Remove services that no longer earn their place; load the rest on interaction (facades for embeds, delayed consent-gated tags). Each third party is also a privacy and performance dependency.

   • www.craigslist.org718 kB
   • 32 kB

   WSG 3.5: Treat third parties the same as first parties
2. Reduce JavaScript payloadsave ~0.018 g/visit (161 kB)Medium impact · moderate effort

   3 scripts total 643 kB on the wire (2.15 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.

   • browsePostings-2026-08-13-08-33-7cf685d65a04b…628 kB
   • d58afecda5261cb9fcb91b2d144412254d004485.js8.6 kB
   • manifest.js6.5 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
3. 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
4. Collapse the redirect chainMedium impact · quick fix

   The address that was scanned goes through 3 redirects before the document is served, ending at https://www.craigslist.org/area/leipzig. Every hop is a full round trip on a connection that has not warmed up yet.

   Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.

   • https://craigslist.com/redirects to https://www.craigslist.org/area/leipzig

   WSG 4.4: Setup necessary error pages and redirection links
5. Upgrade compression beyond gzipsave ~0.012 g/visit (109 kB)Advisory · quick fix

   728 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.

   • browsePostings-2026-08-13-08-33-7cf685d65a04b…628 kB
   • homePage-2026-08-10-15-23-fe4ff1510066102d9f6…73 kB
   • craigslist.com10 kB
   • d58afecda5261cb9fcb91b2d144412254d004485.js8.6 kB
   • manifest.js6.5 kB

   WSG 4.3: Reduce data transfer with compression
6. Optimize web fontssave ~0.0011 g/visit (9.7 kB)Advisory · quick fix

   1 font file total 32 kB, 1 not in WOFF2.

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

   • wAP2A8AAOgAAARUhBgc32 kB

   WSG 2.11: Use optimized web typography
7. Upgrade connections to HTTP/2 or HTTP/3Advisory · quick fix

   1 host serves five or more resources over HTTP/1.1, paying per-request connection and header overhead newer protocols eliminate.

   Enable HTTP/2 (or HTTP/3) on the server or move the assets behind a CDN that speaks it; multiplexing makes many small requests nearly free.

   • www.craigslist.org5 requests over http/1.1

   WSG 3.1: Set goals based on performance and energy impact

Where the bytes are

• JavaScript643 kB · 3 req
• CSS73 kB · 1 req
• Fonts32 kB · 1 req
• HTML12 kB · 2 req

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