Skip to content

Your site vs. core-js average

Your site
81
core-js average
73
CategoryYour scorePeer avgDeltaPercentile
Performance7573+2—
Security8267+15—
Accessibility8261+21—
SEO9590+5—
Infrastructure8386-3—
Compliance7377-4—
Content7982-3—
Sustainability7169+2—

Better than 91% of core-js sites

Run another audit to improve your score →

Category: JavaScript libraries

core-js

Based on 1814 real audits

37
Avg. Performance
88
Avg. Accessibility
85
Avg. Best Practices
91
Avg. SEO
67
Avg. Security
73
Avg. Composite
37 /100
Avg. Performance
431 ms
Avg. TTFB
73 /100
Avg. Composite
1814
Sites Audited

How core-js sites compare

core-js sites tend to score below average on performance (37/100), compared to the global average of 66/100.

Recent Audits

View adoption trends → See all 1638 websites using core-js →
SitePerformanceGradeAudited
svennouwen.nl94A2026-10-06
svennouwen.nl95A2026-10-06
www.boat-lifestyle.com26C2026-10-06
renaissancejewel.com26C2026-10-05
manuelmedina.me97B2026-10-03
brettpinegar.com38C2026-10-03
revenuebase.ai45B2026-10-03
ditchcarbon.com32B2026-10-03
www.clay.com26B2026-10-03
www.presentandperform.com48B2026-10-02

Commonly Used With

Sites that use core-js also commonly use:

Open Graph Miscellaneous 1546Google Tag Manager Tag managers 1329Google Search Console Analytics 1304Google Analytics Analytics 1058jQuery JavaScript libraries 933Microsoft Analytics 894Priority Hints Performance 864HSTS Security 850Facebook SDK Analytics 623Facebook Pixel Analytics 611

Compare with...

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

FAQ

What is the average Lighthouse performance score for core-js sites?
Based on 1814 real audits, core-js sites score an average of 37/100 on Lighthouse performance.
How does core-js compare on web security?
core-js sites score an average security grade of 67/100 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 431ms based on 1814 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.

Audit your core-js site now

Run Audit

Send Feedback