REDUCE LATENCY AND INCREASE CACHE HITS WITH REGIONAL TIERED CACHE

Summary from the TLDR Web Dev newsletter

Tier cache allows users to organize Cloudflare data centers into tiers, where only high tiers can request content from origin servers, and send content to lower tier servers closer to customers. Cloudflare adds a regional tier in between low and high tiers so low tiers can request content from regional tier before high tiers. This reduces the number of requests to high tiers, resulting in lower origin load and overall latency. Overall there's an average of 50-100ms improvement in tail cache hits using regional cache tiers.