A block has a storage capacity, and once it's used up, it can be closed and linked to a previously served block.
Every fragment means promises created for read() calls, promises for backpressure coordination, intermediate buffer allocations, and { value, done } result objects – most of which become garbage almost immediately.
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（三）违法行为已涉嫌犯罪的，移送有关主管机关依法追究刑事责任；
GC thrashing in SSR: Batched chunks (Uint8Array[]) amortize async overhead. Sync pipelines via Stream.pullSync() eliminate promise allocation entirely for CPU-bound workloads.