Adoptium vs CDNJS
Same instrument, two spec sheets — measured, not claimed.
Adoptium vs CDNJS: common questions
Which is more reliable, Adoptium or CDNJS?
Both are neck-and-neck — Adoptium and CDNJS each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, Adoptium or CDNJS?
CDNJS has the lower median latency in our checks — Adoptium responds in 476 ms versus CDNJS at 281 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do Adoptium and CDNJS need an API key?
Neither needs a paid key — Adoptium is callable with no signup, and CDNJS is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Adoptium and CDNJS from the browser?
Yes — both Adoptium and CDNJS send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Adoptium and CDNJS free for commercial use?
Adoptium has unclear commercial terms, and CDNJS has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.