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Blue vs core-js

Based on 1 and 1599 real audits

View Blue details | View core-js details
MetricBluecore-jsWinner
Performance2636core-js
Accessibility7188core-js
Best Practices7784core-js
SEO8591core-js
Security6065core-js
TTFB336ms379msBlue
Composite6872core-js
Performance
Blue
26
core-js
36
Accessibility
Blue
71
core-js
88
Security
Blue
60
core-js
65
SEO
Blue
85
core-js
91
Composite
Blue
68
core-js
72

core-js outperforms Blue in 6 of 7 categories, with a stronger composite score (72 vs 68). Blue leads in TTFB.

When to choose Blue

Choose Blue when your primary concern is server response time. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose core-js

Choose core-js when your primary concern is accessibility and performance. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1 audited Blue sites and 1599 audited core-js sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, Blue or core-js?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 26 on average).
Which has better security, Blue or core-js?
core-js sites score higher on security analysis (65 vs 60 on average).
Which has better accessibility, Blue or core-js?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 71). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, Blue or core-js?
core-js sites score higher on Lighthouse SEO signals (91 vs 85 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), Blue or core-js?
Blue sites show lower Time to First Byte (336 ms vs 379 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose Blue or core-js for my website?
Both platforms have trade-offs. core-js scores higher on overall composite score while Blue may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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