Cloudrelease
How we cut CDN metadata lookup latency by 91%
The brief
Vercel reported on September 10 that grouping CDN routing metadata into indexed files cut its measured 99th-percentile lookup time from 215.8 to 19.1 milliseconds. The roughly 200 KB groups warm multiple paths in one fetch while parsing only the requested record. These are Vercel's production measurements from August 5–12; deployments built after July 17 already use the format, while older ones need redeployment.
AI-assisted brief
Source Vercel
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