open.az/en

The numbers

First visit

1.06 g CO₂e

Return visit

0.0077 g CO₂e

Hosting

verified green

LCP

2.48 s

CLS

0.001

TTFB

563 ms

At 10,000 views a month this page emits about 96.1 kg CO₂e a year, roughly 394 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. Serve images at the size they displaysave ~0.309 g/visit (3.40 MB)High impact · quick fix

   20 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.

   • b37e248bd8afd041446c6d6a4ddea094.png595 kB
   • a8c82c61bf7ecea6f7307778ac4d3577.png576 kB
   • a8c82c61bf7ecea6f7307778ac4d3577.png576 kB
   • bf8e576a28992307d06f9e788034ed53.png542 kB
   • 4e18dd6d9bca69cffab098a05ecf34d6.png518 kB

   WSG 2.9: Optimize media to reduce resource use
2. Convert and compress imagessave ~0.295 g/visit (3.24 MB)High impact · quick fix

   24 images (7.20 MB) 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.

   • category_16.ab121ec5.png691 kB
   • b37e248bd8afd041446c6d6a4ddea094.png595 kB
   • a8c82c61bf7ecea6f7307778ac4d3577.png576 kB
   • bf8e576a28992307d06f9e788034ed53.png542 kB
   • 4e18dd6d9bca69cffab098a05ecf34d6.png518 kB

   WSG 2.9: Optimize media to reduce resource use
3. Reduce JavaScript payloadsave ~0.017 g/visit (188 kB)High impact · moderate effort

   18 scripts total 751 kB on the wire (2.52 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.

   • 8277-c5e8930c0d05136e.js193 kB
   • 2865-7e9bf182855e543b.js113 kB
   • 2451-ea8ae78b121d1a3a.js112 kB
   • 1482-0e998e5849ae311e.js74 kB
   • 2454-107230b7a53d9836.js67 kB

   WSG 3.2: Minify and remove unused codeWSG 3.3: Modularize bandwidth-heavy components
4. Optimize web fontssave ~0.022 g/visit (239 kB)Medium impact · quick fix

   9 font files total 367 kB, 9 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.

   • 0b10579e21c3a1d0-s.p.ttf41 kB
   • 82551a022226a0bf-s.p.ttf41 kB
   • 401dd45866ea7abe-s.p.ttf41 kB
   • 30c63033d2fc37b0-s.p.ttf41 kB
   • 78c93f2cc8580015-s.p.ttf41 kB

   WSG 2.11: Use optimized web typography
5. Collapse the redirect chainMedium impact · quick fix

   The address that was scanned goes through 2 redirects before the document is served, ending at https://open.az/en. 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://open.az/redirects to https://open.az/en

   WSG 4.4: Setup necessary error pages and redirection links
6. Upgrade compression beyond gzipsave ~0.011 g/visit (122 kB)Advisory · quick fix

   813 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.

   • 8277-c5e8930c0d05136e.js193 kB
   • 2865-7e9bf182855e543b.js113 kB
   • 2451-ea8ae78b121d1a3a.js112 kB
   • 1482-0e998e5849ae311e.js74 kB
   • 2454-107230b7a53d9836.js67 kB

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

   At 8.80 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

Where the bytes are

• Images7.57 MB · 39 req
• JavaScript751 kB · 18 req
• Fonts367 kB · 9 req
• HTML51 kB · 1 req
• CSS47 kB · 4 req
• Data (fetch)8.2 kB · 17 req
• Data (XHR)2.2 kB · 1 req
• Other0 B · 1 req