Compact blocks, and compact block protocol are a recent addition to the Bitcoin (BTC) data propagation protocol that aims to reduce bandwidth requirements and, possibly, reduce latency as well. In this work we evaluate operation of BTC network under a mix of regular, and compact block traffic, assuming that nodes randomly leave, and re-join the network, and perform block and, optionally, transaction pool (mempool) synchronization upon returning. Our analysis begins by evaluating block, and transaction deficits accumulated during the node absence and block synchronization. Then, we analyze mempool behavior, and show that mempool synchronization is necessary since it decreases probability of transaction deficit, and the need for transaction retrieval actions. Finally, we analyze the impact of synchronization activities, and transaction deficit on data distribution times in the BTC network with high, and low bandwidth distribution modes for a mix of compact, and regular blocks. Results demonstrate resilience to node absence, and subsequent synchronization, as well as substantial performance improvements for small protocol changes. Furthermore we show that the low bandwidth mode is more resilient to potential security attacks.

中文翻译：

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具有同步节点以及常规块和紧凑块的混合的比特币网络的性能

紧凑块和紧凑块协议是比特币（BTC）数据传播协议的最新成员，该协议旨在减少带宽需求，并可能还减少延迟。在这项工作中，我们假设节点随机离开并重新加入网络，并在返回时执行块和（可选）事务池（内存池）同步，评估BTC网络在常规和紧凑块流量混合下的运行情况。我们的分析开始于评估区块，以及在节点缺失和区块同步期间累积的交易赤字。然后，我们分析内存池的行为，并表明内存池同步是必需的，因为它可以减少事务不足的可能性以及对事务检索操作的需求。最后，我们分析同步活动的影响，在高带宽和低带宽分配模式下（紧凑型和常规型块的混合），BTC网络中数据分配时间上的交易缺陷。结果证明了对节点缺失和后续同步的抵御能力，以及对较小协议更改的实质性性能改进。此外，我们表明，低带宽模式对潜在的安全攻击更具弹性。