B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Dated
33%
33% -- site speed improvement for bücher.de (2019)
German e-commerce company bücher.de increased its site speed by 33% through image optimization, caching, and content prioritization.
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
33%
Unit
Percentage
Data Vintage
2019
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Google
Primary
Tier A
https://agenciaclepsidra.com.ar/en/2019/06/11/cada-segundo-cuenta-la-velocidad-de-tu-sitio-movil-pue… ↗
Source Article
Cada segundo cuenta: la velocidad de tu sitio móvil puede definir el crecimiento de tu marca
Original Research
Google
· Original study ↗
Methodology
Company case study via Google
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
bücher.de: 33% site speed improvement. Source: Google (2019). Via Lighthouse Intelligence -- https://lighthousedata.io/data/bucher-de-speed-increase
HTML Embed
<blockquote cite="https://lighthousedata.io/data/bucher-de-speed-increase" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>33%</strong> -- site speed improvement for bücher.de<br><small>Source: Google (2019) · <a href="https://lighthousedata.io/data/bucher-de-speed-increase" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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