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In Quorum, to help decide between Raft and Istanbul BFT (IBFT) consensus, which has a better (faster) block confirmation time? Assuming Ceteris Paribus.

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Quorum's raft implementation is specifically designed for the speed of txn processing and confirmation, thus Raft mode is going to be much faster than IBFT.

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This paper Performance Evaluation of the Quorum Blockchain Platform gives a good comparison between Raft and IBFT in term of latency and throughput.

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  • This should be an accepted answer, since in conclusion they claim: "RAFT and IBFT are comparable in terms of throughput except that RAFT performs slightly better at higher input transaction rates above 1650 tx/sec and IBFT slightly over performs RAFT for lower transaction rates, quite contrary to our expectation."
    – Cordo van Saviour
    Mar 27, 2019 at 10:32
  • Yes, that's correct.
    – Noureddine
    Mar 31, 2019 at 6:40

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