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core-js vs PubSubJS

Based on 1582 and 24 real audits

View core-js details | View PubSubJS details
Metriccore-jsPubSubJSWinner
Performance3643PubSubJS
Accessibility8892PubSubJS
Best Practices8490PubSubJS
SEO9190core-js
Security6564core-js
TTFB374ms213msPubSubJS
Composite7273PubSubJS
Performance
core-js
36
PubSubJS
43
Accessibility
core-js
88
PubSubJS
92
Security
core-js
65
PubSubJS
64
SEO
core-js
91
PubSubJS
90
Composite
core-js
72
PubSubJS
73

PubSubJS outperforms core-js in 5 of 7 categories, with a stronger composite score (73 vs 72). core-js leads in SEO, security.

When to choose core-js

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

When to choose PubSubJS

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

How this comparison was built

Scores are medians across 1582 audited core-js sites and 24 audited PubSubJS 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 →

FAQ

Which is faster, core-js or PubSubJS?
Based on real BeaverCheck audits, PubSubJS sites score higher on Lighthouse performance (43 vs 36 on average).
Which has better security, core-js or PubSubJS?
core-js sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, core-js or PubSubJS?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor PubSubJS (92 vs 88). 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, core-js or PubSubJS?
core-js sites score higher on Lighthouse SEO signals (91 vs 90 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), core-js or PubSubJS?
PubSubJS sites show lower Time to First Byte (213 ms vs 374 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 core-js or PubSubJS for my website?
Both platforms have trade-offs. PubSubJS scores higher on overall composite score while core-js 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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