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core-js vs Postscript

Based on 2041 and 8 real audits

View core-js details | View Postscript details
Metriccore-jsPostscriptWinner
Performance3728core-js
Accessibility8891Postscript
Best Practices8685core-js
SEO9191Tie
Security6873Postscript
TTFB483ms284msPostscript
Composite7474Tie
Performance
core-js
37
Postscript
28
Accessibility
core-js
88
Postscript
91
Security
core-js
68
Postscript
73
SEO
core-js
91
Postscript
91
Composite
core-js
74
Postscript
74

Postscript outperforms core-js in 3 of 7 categories, with a stronger composite score (74 vs 74). core-js leads in performance, best practices.

When to choose core-js

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

When to choose Postscript

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

How this comparison was built

Scores are medians across 2041 audited core-js sites and 8 audited Postscript 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, core-js or Postscript?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 28 on average).
Which has better security, core-js or Postscript?
Postscript sites score higher on security analysis (73 vs 68 on average).
Which has better accessibility, core-js or Postscript?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Postscript (91 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 Postscript?
core-js sites score higher on Lighthouse SEO signals (91 vs 91 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 Postscript?
Postscript sites show lower Time to First Byte (284 ms vs 483 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 Postscript for my website?
Both platforms have trade-offs. core-js 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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