│ │ same │ user-space │ via KVM │ all
full. append again has to allocate a new backing store, this time
。快连下载-Letsvpn下载对此有专业解读
let totalBytes = 0;
strict (default): Rejects writes when the buffer is full and too many writes are pending. Catches "fire-and-forget" patterns where producers ignore backpressure.