openrouter.ai/deepseek/deepseek-v4-pro-0813

The numbers

First visit

0.582 g CO₂e

Return visit

0.011 g CO₂e

Hosting

verified green

LCP

700 ms

CLS

0.05

TTFB

434 ms

At 10,000 views a month this page emits about 52.7 kg CO₂e a year, roughly 216 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 2%, and world-average grid intensity. How we calculate this

1. Reduce JavaScript payloadsave ~0.081 g/visit (883 kB)High impact · moderate effort

   152 scripts total 3.53 MB on the wire (9.82 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.

   • 537s198 kB
   • js191 kB
   • 170gtk9q5o5mw.js144 kB
   • ui-common_ui_e21f27_1.30.1.js127 kB
   • 3wvh216_j1d7x.js114 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
2. Optimize web fontssave ~0.019 g/visit (204 kB)Medium impact · quick fix

   7 font files total 441 kB, 2 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.

   • PlusJakartaSans_Italic_VariableFont_wght-s.p.…87 kB
   • PlusJakartaSans_VariableFont_wght-s.p.3adhwoh…80 kB
   • GeistMono_Variable.p.1sg4ifey12l8-.woff261 kB
   • gordita_bold-s.p.3v-a8bgqavs7d.woff254 kB
   • gordita_medium-s.p.1djqx3tvkaz4b.woff253 kB

   WSG 2.11: Use optimized web typography
3. Audit third-party servicessave ~0.010 g/visit (111 kB)Medium impact · moderate effort

   9 third-party domains account for 222 kB (5% 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.googletagmanager.com191 kB
   • t0.gstatic.com18 kB
   • static.cloudflareinsights.com12 kB
   • stats.g.doubleclick.net556 B
   • cdn.protect.clerk.com421 B
   • a3fe83487cb140d1.client.protect.clerk.com130 B

   WSG 3.5: Treat third parties the same as first parties
4. Convert and compress imagessave ~0.0049 g/visit (54 kB)Medium impact · quick fix

   8 images (119 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.

   • image-proxy63 kB
   • DeepSeek.png28 kB
   • faviconV28.3 kB
   • faviconV27.1 kB
   • nav-lockup-dark.png4.8 kB

   WSG 2.9: Optimize media to reduce resource use
5. Lazy-load below-the-fold mediasave ~0.0045 g/visit (49 kB)Medium impact · quick fix

   7 below-the-fold images/iframes (114 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.

   • image-proxy63 kB
   • DeepSeek.png28 kB
   • faviconV28.3 kB
   • faviconV27.1 kB
   • openrouter-light.svg4.6 kB

   WSG 2.9: Optimize media to reduce resource use
6. Upgrade compression beyond gzipsave ~0.010 g/visit (111 kB)Advisory · quick fix

   743 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.

   • models455 kB
   • 537s198 kB
   • deepseek-v4-pro-081330 kB
   • author-models12 kB
   • v4513226cdae34746b4dedf0b4dfa099e178179150949612 kB

   WSG 4.3: Reduce data transfer with compression
7. Set a page-weight budgetAdvisory · moderate effort

   At 4.81 MB per view this page rates F. 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
8. Simplify the document structureAdvisory · larger effort

   The page renders 2902 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

• JavaScript3.53 MB · 152 req
• Data (fetch)587 kB · 45 req
• Fonts441 kB · 7 req
• Images128 kB · 11 req
• CSS91 kB · 5 req
• HTML30 kB · 1 req
• Data (XHR)1.8 kB · 2 req
• Other556 B · 1 req