speedrun.a16z.com/apply

The numbers

First visit

0.344 g CO₂e

Return visit

0.0090 g CO₂e

Hosting

unknown

LCP

884 ms

CLS

0

TTFB

7 ms

At 10,000 views a month this page emits about 31.2 kg CO₂e a year, roughly 128 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. Audit third-party servicessave ~0.062 g/visit (551 kB)High impact · moderate effort

   8 third-party domains account for 1.10 MB (47% 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.gstatic.com725 kB
   • www.googletagmanager.com300 kB
   • fonts.gstatic.com40 kB
   • www.google.com33 kB
   • cdn.sanity.io2.3 kB
   • region1.google-analytics.com559 B

   WSG 3.5: Treat third parties the same as first parties
2. Reduce JavaScript payloadsave ~0.052 g/visit (462 kB)High impact · moderate effort

   21 scripts total 1.85 MB on the wire (6.54 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.

   • _app-96134cb456a3216c.js680 kB
   • recaptcha__en.js341 kB
   • recaptcha__en.js340 kB
   • js170 kB
   • gtm.js131 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. Upgrade compression beyond gzipsave ~0.013 g/visit (113 kB)Advisory · quick fix

   756 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.

   • recaptcha__en.js341 kB
   • recaptcha__en.js340 kB
   • styles__ltr.css42 kB
   • anchor29 kB
   • bframe2.2 kB

   WSG 4.3: Reduce data transfer with compression
5. Optimize web fontssave ~0.010 g/visit (91 kB)Advisory · quick fix

   8 font files total 260 kB.

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

   • KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff240 kB
   • 64c1c31384189284-s.p.woff237 kB
   • 3d660e1dc7b780d4-s.p.woff237 kB
   • 8eb8b7822da4764a-s.p.woff237 kB
   • dc72bb61e9fdf7fa-s.p.woff237 kB

   WSG 2.11: Use optimized web typography
6. Stop downloading the same asset twicesave ~0.0041 g/visit (36 kB)Advisory · quick fix

   2 assets were fetched more than once in a single page load (343 kB of repeated transfer).

   Usually a script injected twice or cache-busting query strings that differ per reference. Load each asset once and let the HTTP cache do its job.

   • %5B%5B...uri%5D%5D-ce91a11d19f32e59.js2 downloads · 6.3 kB
   • recaptcha__en.js2 downloads · 681 kB

   WSG 3.2: Minify and remove unused code
7. Remove references to broken resourcessave ~<0.001 g/visit (201 B)Advisory · quick fix

   1 request 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.

   • meHTTP 401 · 201 B

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

   At 2.32 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

Where the bytes are

• JavaScript1.85 MB · 21 req
• Fonts260 kB · 8 req
• CSS71 kB · 3 req
• Images65 kB · 9 req
• HTML43 kB · 3 req
• Data (fetch)31 kB · 7 req
• Other3.2 kB · 1 req