Request collapsing for ISR cache misses

T1Covered by 1 source · first reported by Vercel (blog + changelog) at 25 Sept 2025, 13:00 UTC

request collapsing Incremental Static Regeneration (ISR) The Vercel CDN now prevents cache stampedes throughon an expiredpage into a single function invocation per region. Without collapsing, simultaneous requests each trigger regeneration, wasting compute and overloading backends. With collapsing…