Stats on compact block reconstructions

Posted by ajtowns

Sep 28, 2026/03:29 UTC

Compact block relay, while criticized by some, continues to play a significant role in reducing bandwidth and latency in blockchain technology. This system allows for only the missing transactions to be relayed instead of the entire block, which results in mostly sub-second block reconstruction times, demonstrating its efficiency over traditional header/block message relay methods.

However, there are emerging challenges that need addressing. Reports indicate a notable occurrence of double-spends, particularly among transactions at the top of the mempool. This could potentially be attributed to competitive behavior in scenarios such as runestone auctions or similar events. Moreover, the issue of replace-by-fee (RBF) failures has been observed, where transactions with higher fee rates fail to enter the mempool, suggesting inadequacies in the current 1p1c (one parent one child) policy.

Additionally, there appears to be a conflict between older methods of greedy-ancestor template building and newer strategies like the cluster mempool approach. These conflicts may be impacting the performance and reliability of transaction processing and mempool management. The exact influence of these factors is still uncertain, indicating a need for further investigation and possibly adaptations in the system to enhance its robustness and effectiveness.

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Aug 2 - Sep 29, 2026

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