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LazySizes

Based on 4 real audits

32
Avg. Performance
94
Avg. Accessibility
78
Avg. Best Practices
90
Avg. SEO
62
Avg. Security
69
Avg. Composite
32 /100
Avg. Performance
58 ms
Avg. TTFB
69 /100
Avg. Composite
4
Sites Audited

How LazySizes sites compare

LazySizes sites tend to score below average on performance (32/100), compared to the global average of 49/100.

Recent Audits

SitePerformanceGradeAudited
www.microsoft.com40C2026-04-04
www.visualstudio.com44C2026-04-04
www.mongodb.com26D2026-04-04
www.glossier.com19C2026-04-04

Commonly Used With

Sites that use LazySizes also commonly use:

React JavaScript frameworks 3Priority Hints Performance 3Open Graph Miscellaneous 3HSTS Security 3core-js JavaScript libraries 3Cart Functionality Ecommerce 3Optimizely A/B Testing 2Microsoft Clarity Analytics 2Microsoft Advertising Advertising 2jQuery JavaScript libraries 2

Compare with...

LazySizes vs ReactLazySizes vs Priority HintsLazySizes vs Open GraphLazySizes vs HSTSLazySizes vs core-jsLazySizes vs Cart FunctionalityLazySizes vs OptimizelyLazySizes vs Microsoft ClarityLazySizes vs Microsoft AdvertisingLazySizes vs jQuery

FAQ

What is the average Lighthouse performance score for LazySizes sites?
Based on 4 real audits, LazySizes sites score an average of 32/100 on Lighthouse performance.
How does LazySizes compare on web security?
LazySizes sites score an average security grade of 62/100 in BeaverCheck audits.
What is the average page load time for LazySizes websites?
The average Time to First Byte (TTFB) for LazySizes sites is 58ms based on 4 audits.
How can I improve my LazySizes site's performance?
Run a free audit on BeaverCheck to get specific recommendations for your LazySizes site. Common issues include render-blocking resources, unoptimized images, and missing caching headers.

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