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Category: JavaScript libraries

Polyfill

Based on 7 real audits

53
Avg. Performance
88
Avg. Accessibility
96
Avg. Best Practices
81
Avg. SEO
69
Avg. Security
78
Avg. Composite
53 /100
Avg. Performance
46 ms
Avg. TTFB
78 /100
Avg. Composite
7
Sites Audited

How Polyfill sites compare

Polyfill sites perform near the global average with a mean Lighthouse performance score of 53/100 (global average: 57/100).

Recent Audits

See all 4 websites using Polyfill →
SitePerformanceGradeAudited
www.theguardian.com49B2026-05-09
www.theguardian.com65B2026-05-09
yaml.org80C2026-04-22
eonline.com9C2026-04-21
guardian.co.uk54C2026-04-21
theguardian.com74C2026-04-15
www.theguardian.com46C2026-04-04

Commonly Used With

Sites that use Polyfill also commonly use:

HSTS Security 6core-js JavaScript libraries 6Cart Functionality Ecommerce 5RSS Miscellaneous 5Emotion JavaScript frameworks 5Adjust Analytics 5Fastly CDN 3HTTP/3 Miscellaneous 3Varnish Caching 3Google Search Console Analytics 3

Compare with...

Polyfill vs HSTSPolyfill vs core-jsPolyfill vs Cart FunctionalityPolyfill vs RSSPolyfill vs EmotionPolyfill vs AdjustPolyfill vs FastlyPolyfill vs HTTP/3Polyfill vs VarnishPolyfill vs Google Search Console

FAQ

What is the average Lighthouse performance score for Polyfill sites?
Based on 7 real audits, Polyfill sites score an average of 53/100 on Lighthouse performance.
How does Polyfill compare on web security?
Polyfill sites score an average security grade of 69/100 in BeaverCheck audits.
What is the average page load time for Polyfill websites?
The average Time to First Byte (TTFB) for Polyfill sites is 46ms based on 7 audits.
How can I improve my Polyfill site's performance?
Run a free audit on BeaverCheck to get specific recommendations for your Polyfill site. Common issues include render-blocking resources, unoptimized images, and missing caching headers.

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