about.gitlab.com

The numbers

First visit

0.299 g CO₂e

Return visit

0.0023 g CO₂e

Hosting

verified green

LCP

956 ms

CLS

0.002

TTFB

23 ms

At 10,000 views a month this page emits about 27.0 kg CO₂e a year, roughly 111 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 1%, and world-average grid intensity. How we calculate this

1. Audit third-party servicessave ~0.062 g/visit (676 kB)High impact · moderate effort

   10 third-party domains account for 1.35 MB (55% 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.com985 kB
   • cdn.cookielaw.org227 kB
   • res.cloudinary.com119 kB
   • dx.mountain.com18 kB
   • geolocation.onetrust.com504 B
   • 18.210.229.244353 B

   WSG 3.5: Treat third parties the same as first parties
2. Reduce JavaScript payloadsave ~0.039 g/visit (426 kB)High impact · moderate effort

   110 scripts total 1.71 MB on the wire (5.21 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.

   • gtm.js199 kB
   • js175 kB
   • DHxYgiEi.js169 kB
   • js158 kB
   • js154 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
3. Optimize web fontssave ~0.013 g/visit (142 kB)Medium impact · quick fix

   2 font files total 404 kB.

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

   • GitLabSans.woff2326 kB
   • GitLabMono.woff279 kB

   WSG 2.11: Use optimized web typography
4. Serve images at the size they displaysave ~0.0040 g/visit (44 kB)Medium impact · quick fix

   3 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.

   • wptltgnfxjwuljdy07fs.png56 kB
   • kdkx1wwhhxlu0krrmy1f.png27 kB
   • qsofzzb8rawp0tmjhqiq.png6.1 kB

   WSG 2.9: Optimize media to reduce resource use
5. Upgrade compression beyond gzipsave ~0.0032 g/visit (36 kB)Advisory · quick fix

   238 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.

   • otBannerSdk.js140 kB
   • en.json37 kB
   • otPcTab.json15 kB
   • spx9.3 kB
   • otSDKStub.js9.1 kB

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

   At 2.47 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
7. Remove the entry redirectAdvisory · quick fix

   The address that was scanned goes through 1 redirect before the document is served, ending at https://about.gitlab.com/. 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://gitlab.com/redirects to https://about.gitlab.com/

   WSG 4.4: Setup necessary error pages and redirection links

Where the bytes are

• JavaScript1.71 MB · 110 req
• Fonts404 kB · 2 req
• Images131 kB · 16 req
• Data (fetch)68 kB · 14 req
• Other62 kB · 1 req
• CSS56 kB · 35 req
• HTML40 kB · 1 req
• Data (XHR)3.2 kB · 2 req