The latest version of Bitcoin Core software has brought a lot of improvement in the performance of the Bitcoin network. Bitcoin Core version 0.12.1 was released earlier last month with lots of new features supporting scalability of Bitcoin network in the near future.
With Bitcoin companies gradually upgrading to the newer and updated versions of Bitcoin Core, there has been a significant decrease in the number of Orphan Blocks in the network. According to available data, the average number of Orphan Blocks created during the mining process has gone down to about 7 per month since the past few updates. The main reason for a reduction in the number of Orphan Blocks is attributed to faster block propagation, which is brought about by performance improvements within the peer to peer network.
For those who are new to the technical aspects of Bitcoin, the Orphan Block or a Stale Block is created when more than one miner discovers and solves the same block. Bitcoin is a decentralized open source digital currency protocol that runs on the processing power supplied by the miners connected to the network. These miners use mining hardware like Application Specific Integrated