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Category: JavaScript libraries

core-js

Based on 1570 real audits

36
Avg. Performance
88
Avg. Accessibility
84
Avg. Best Practices
91
Avg. SEO
65
Avg. Security
72
Avg. Composite
36 /100
Avg. Performance
371 ms
Avg. TTFB
72 /100
Avg. Composite
1570
Sites Audited

How core-js sites compare

core-js sites tend to score below average on performance (36/100), compared to the global average of 65/100.

Recent Audits

See all 1480 websites using core-js →
SitePerformanceGradeAudited
splsezzespa.it66C2026-05-26
conad.it41B2026-05-26
plunketts.net35C2026-05-26
uol.com.br28C2026-05-25
banco.bradesco33C2026-05-25
dr.dk28C2026-05-22
peakhealthandfitness.co.uk52C2026-05-21
mindmx.org34B2026-05-20
bodonu.no22C2026-05-19
mindmx.org38B2026-05-18

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1339Google Search Console Analytics 1214Google Tag Manager Tag managers 1176Google Analytics Analytics 919Microsoft Analytics 853jQuery JavaScript libraries 772HSTS Security 738Priority Hints Performance 705Facebook SDK Analytics 548Google Workspace Email 545

Compare with...

core-js vs Open Graphcore-js vs Google Search Consolecore-js vs Google Tag Managercore-js vs Google Analyticscore-js vs Microsoftcore-js vs jQuerycore-js vs HSTScore-js vs Priority Hintscore-js vs Facebook SDKcore-js vs Google Workspace

FAQ

What is the average Lighthouse performance score for core-js sites?
Based on 1570 real audits, core-js sites score an average of 36/100 on Lighthouse performance.
How does core-js compare on web security?
core-js sites score an average security grade of 65/100 in BeaverCheck audits.
What is the average page load time for core-js websites?
The average Time to First Byte (TTFB) for core-js sites is 371ms based on 1570 audits.
How can I improve my core-js site's performance?
Run a free audit on BeaverCheck to get specific recommendations for your core-js site. Common issues include render-blocking resources, unoptimized images, and missing caching headers.

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