critical85%
ISR revalidation retains RSC segment data via CachedParams WeakMap (external/arrayBuffers growth, amplified on Node 22)
Next.js ISR revalidation retains RSC segment buffers through a module-scope CachedParams WeakMap whose cached promises capture AsyncLocalStorage context, causing external memory (arrayBuffers) to accumulate until full GC; production impact up to 1.16 GB retained.