Luxury Fashion Website Carbon, CWV & PageSpeed Comparison

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We reviewed over 65 luxury fashion websites, reviewing performance, sustainability, and user-friendliness. Focusing on core performance metrics, such as Digital Carbon Emissions (CO₂e), Site Performance (PERF), SEO, Accessibility (ACS), and Best Practices (BP).



Performance Data

  • Both mobile and desktop sites scored an average of 58.12 for PageSpeed, with most luxury brand websites from Europe (London).
  • Performance scores varied quite a bit, with some websites, like corneliani.com, running super smoothly while others, like Isaia, that could use a little tune-up.

Carbon Emissions (CO₂e)

  • CO₂e values ranged widely, with emissions from 0.013 g to 6.166 g per site with an average of 1.162 g.
  • Websites with lower CO₂e values include corneliani.com (0.013 g), reflecting better optimisation, while Isaia displayed the highest emissions (6.166 g), indicating potential inefficiencies with code, images, and video.

Core Web Vitals (CWV) Performance

  • Many websites failed to meet Core Web Vitals standards, highlighting areas for improvement, especially on mobile performance.
  • Few websites passed CWV standards, with many failing due to issues like PageSpeed and load efficiency, which are critical for reducing digital emissions and improving performance.
  • Sites that met CWV standards (e.g., furla.com and burberry.com) demonstrate lower environmental impact, indicating that CWV alignment supports a reduced digital carbon footprint.

Top Performers in Various Metrics

  • Performance: High-performing sites included fendi.com (78) and tomford.com (96).
  • SEO and Accessibility: Websites like tiffany.com, celine.com, and cartier.com scored excellently in both SEO and accessibility.
  • Best Practices (BP): Sites such as corneliani.com, chanel.com, and burberry.com scored 100 in Best Practices, indicating adherence to industry standards and high-quality code practices.

Overall Assessment

  • We saw some top performers too! Fendi.com and tomford.com impressed with their overall speed, while tiffany.com, celine.com, and cartier.com stood out for being both easy to find in search engines (SEO) and super accessible for everyone.
  • When it comes to following the industry best practices, corneliani.com, chanel.com, and burberry.com got top marks, showing they're setting the bar high for website code quality. 
  • Many sites with "Very Poor" performance were characterised by high CO₂e emissions and low accessibility scores, indicating a need for efficiency improvements in these areas to align with sustainable and accessible web standards.
  • The analysis shows that by reducing CO₂e emissions through optimised web practices and using the right technology, luxury brands can align their digital presence with sustainability initiatives, which increasingly matter to eco-conscious consumers.
  • Efficiency in web performance supports sustainability and enhances user experience, a critical factor for luxury brands aiming to meet high consumer expectations.

Recommendations for Improvement

  • Implementing efficient hosting, compressing media files, optimising mobile experiences, and improving CWV scores can all contribute to a lower digital carbon footprint.
  • Regular audits and performance tracking using SiteBeacon can ensure ongoing improvements, helping brands minimise their environmental impact and meet the growing demand for sustainable digital practices.

Find out the in-depth data analysis here.


Performance and CO₂e Analysis Table for 65+ UK-based Luxury Fashion Websites

Audited in September

Region:
  • Europe (London)

Top Luxury Fashion Websites

SerialURL
01diesel.comN/A0.162 g 77 54 96 75Excellent
02fentybeauty.comFailed5.308 g 9 92 100 75Very Poor
03gb.lanvin.comPassed6.614 g 55 92 92 100Very Poor
04laperla.comPassed3.382 g 50 92 98 82Very Poor
05malo.it/enFailed7.700 g 34 100 90 96Very Poor
06us.balmain.com/enFailed1.299 g 53 100 85 93Very Poor
07us.canali.comFailed3.640 g 34 100 96 75Very Poor
08us.jimmychoo.com/en/homeFailed2.601 g 26 92 76 57Very Poor
09us.louisvuitton.com/eng-us/homep...Failed0.391 g 46 100 89 96Good
10www.andrelaug.comN/A0.498 g 62 100 92 100Moderate
11www.armani.com/en-gbFailed0.487 g 70 100 96 100Good
12www.audemarspiguet.com/com/en/ho...Failed4.402 g 38 92 92 82Very Poor
13www.balenciaga.com/fr-gbFailed0.896 g 38 75 90 89Very Poor
14www.borsalino.com/gb_enFailed2.116 g 40 92 77 100Very Poor
15www.bottegaveneta.com/en-gbFailed4.187 g 34 85 77 75Very Poor
16www.brioni.com/en/usFailed14.088 g 55 92 90 100Very Poor
17www.brunellocucinelli.com/enFailed0.641 g 48 100 87 79Moderate
18www.bulgari.com/en-gbFailed0.345 g 75 100 96 100Good
19www.burberry.comPassed0.244 g 66 82 91 100Very Good
20www.cartier.com/en-gbPassed0.612 g 56 92 95 82Moderate
21www.celine.com/en-us/homeFailed0.876 g 42 77 84 100Very Poor
22www.cesareattolini.comN/A12.802 g 33 63 96 100Very Poor
23www.chanel.com/nlFailed0.873 g 48 85 100 96Very Poor
24www.corneliani.comFailed12.533 g 51 92 97 57Very Poor
25www.dkny.comFailed2.990 g 53 92 86 79Very Poor
26www.escada.comPassed1.378 g 54 85 92 96Very Poor
27www.etro.com/gb-enFailed2.579 g 30 92 98 96Very Poor
28www.fendi.comFailed0.890 g 82 100 95 96Very Poor
29www.fila.comFailed0.521 g 71 92 90 79Moderate
30www.fiorucci.com/usFailed5.611 g 10 92 76 89Very Poor
31www.franckmuller.comFailed2.853 g 35 85 95 96Very Poor
32www.furla.com/us/enFailed1.137 g 27 100 79 89Very Poor
33www.genny.comFailed0.293 g 92 100 75 93Very Good
34www.goyard.com/eu_enFailed2.751 g 26 100 82 96Very Poor
35www.gucci.comFailed0.153 g 78 100 86 93Excellent
36www.iceberg.com/ukN/A3.020 g 30 100 84 96Very Poor
37www.isaia.itFailed3.676 g 58 100 96 96Very Poor
38www.jerome-dreyfuss.comFailed4.978 g 55 85 84 96Very Poor
39www.jilsander.com/en-usFailed4.843 g 30 92 76 75Very Poor
40www.katespade.comFailed2.650 g 48 92 87 75Very Poor
41www.kenzo.com/en-gb/homeFailed1.771 g 52 85 84 75Very Poor
42www.lardini.comFailed2.776 g 42 92 89 93Very Poor
43www.larusmiani.itPassed3.595 g 49 100 87 57Very Poor
44www.loewe.com/eur/es/homeFailed1.057 g 30 92 86 96Very Poor
45www.lucianobarbera.comFailed9.471 g 64 77 86 96Very Poor
46www.marcjacobs.comFailed3.314 g 83 85 88 82Very Poor
47www.marianorubinacci.comFailed0.160 g 81 100 100 96Excellent
48www.marni.com/en-usPassed2.511 g 44 92 91 75Very Poor
49www.maxmara.com/Failed0.684 g 63 92 94 82Poor
50www.mcmworldwide.comFailed0.387 g 72 83 93 96Good
51www.michaelkors.global/au/enFailed2.261 g 55 100 97 75Very Poor
52www.moschino.comFailed20.606 g 16 85 79 75Very Poor
53www.moynat.comFailed8.003 g 58 85 73 93Very Poor
54www.nicholaskirkwood.comN/A0.216 g 84 83 90 89Very Good
55www.ninaricci.comFailed3.620 g 77 92 91 71Very Poor
56www.omegawatches.comFailed1.512 g 49 92 100 96Very Poor
57www.oscardelarenta.comFailed2.139 g 48 100 93 93Very Poor
58www.palzileri.com/ukFailed0.330 g 39 92 84 89Very Good
59www.paulsmith.comFailed1.618 g 35 100 87 89Very Poor
60www.paulstuart.comFailed7.988 g 32 92 94 96Very Poor
61www.pinko.com/en-usFailed3.596 g 9 100 86 79Very Poor
62www.pomellato.com/us_enFailed4.742 g 38 92 82 96Very Poor
63www.pucci.comFailed4.755 g 30 92 90 75Very Poor
64www.robertocavalli.com/en-beFailed1.663 g 30 85 89 75Very Poor
65www.rolex.comFailed2.887 g 49 85 96 75Very Poor
66www.rouje.comFailed2.295 g 57 85 71 75Very Poor
67www.tiffany.comFailed2.139 g 65 92 83 96Very Poor
68www.tomford.comFailed0.360 g 73 100 94 100Good
69www.verawang.comFailed11.357 g 15 92 88 93Very Poor
70www.ysl.com/en-gbFailed8.225 g 30 92 96 96Very Poor
71www.zegna.com/uk-enFailed1.360 g 50 92 80 68Very Poor
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