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I can't speak to the others as I work on Quorum, but there are a few good sources that our team uses and references. Here is performance evaluation done by an external team with published method and results: https://arxiv.org/abs/1809.03421 Here is one of the tools we use that tries to standardize a way to submit and measure txn throughput in ethereum like ...


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I am not sure about modifying the nonce with send methods. You can use instead classic web3.eth.sendTransaction method (https://web3js.readthedocs.io/en/v1.2.1/web3-eth.html#sendtransaction). However, you'll need to provide the data field for this transaction. const nonceThatIWant = x; const txObject = smartContractObject.methods.addSomething(_valueToAdd); ...


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The team at Blocknative wrote an excellent post detailing Canceled Transactions that answers your question: https://blog.blocknative.com/blog/canceled-transactions Here is what they say about Canceled TX: What are Canceled transactions? On Ethereum, a Cancel transaction is an attempt to overwrite a currently pending transaction with a new transaction. ...


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