A week ago I shipped Prism's edge layer and wrote a blog post explaining what was good about it and what was wrong with it. The good: bad keys now get rejected from your nearest Cloudflare PoP, no Mumbai round-trip. The wrong: cache hits were still landing in 300–500 milliseconds because the cache itself — Upstash Redis — lives in Mumbai and is single-region.
I'd promised 50 milliseconds in the design doc. I shipped 300–500. I told you that, and I said v1.6.5 would close the gap. Today is v1.6.5.
The thing I shipped
Cloudflare Workers KV is a key-value store that's globally replicated. You write to it once via the Cloudflare API, and within seconds the value is on every Cloudflare datacenter in the world. Reads are local to whichever PoP your request lands at — typically 30–80 milliseconds anywhere.
v1.6.5 is two changes:
