ISR on Vercel is now faster and more cost-efficient

What this post added

This post details optimizations to Vercel's Incremental Static Regeneration (ISR) implementation. Key improvements include regionalized caching, where ISR cache entries are now stored in the same region as the associated functions, leading to lower latency for cache retrieval and faster revalidations. Additionally, automatic compression has been enabled for ISR cache entries, reducing write and read units, as well as Fast Origin Transfer (FOT) costs, resulting in up to 65% savings on ISR reads and writes. These improvements are automatically applied to existing deployments.