AI BriefingCloudflare Launches Origin Range Requests to Halve R2 p99 Time to First Byte
·2026.10.24 03:22
Key point
The self-service feature uses fixed-size cache chunks to reduce tiered cache traffic by 6% and eliminate manual range-size tuning.
Details
- Cloudflare released Origin Range Requests, a self-service feature on all plans that replaces manual range-size tuning with automatic fixed-size chunking.
- For R2, p99 time to first byte dropped by roughly half, and tiered cache traffic decreased by about 6% week over week.
- The new implementation uses Pingora-based fixed-size chunks to align origin fetches, bounding extra work and preventing the memory pressure and bandwidth waste caused by the previous variable range-size configuration.
- A coordinator combines cached, in-flight, and newly fetched bytes to ensure correct HTTP responses (206 Partial Content or 416 Range Not Satisfiable) while validating entity tags and handling If-Range headers.
- Intended for progressive video, resumable downloads, and large AI model files; enabled via Cache Rules in the dashboard or API.
- Does not change cache eligibility for uncacheable responses; origin must support byte ranges.
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