fastly does: https://developer.fastly.com/learning/concepts/stale/#stale-while-revalidate-eliminate-origin-latency https://developer.fastly.com/learning/concept

fastly does: https://developer.fastly.com/learning/concepts/stale/#stale-while-revalidate-eliminate-origin-latency https://developer.fastly.com/learning/concepts/stale/#stale-...