Hedera uses the least energy per transaction: UCL Study


A recent study by University College London (UCL) has once again concluded that Hedera Hashgraph is the most energy-efficient Proof-of-Stake (PoS) blockchain (in terms of energy used per transaction). UCL concluded that the Hedera network used just 0.000003 kiloWatt hours per transaction.

This is not the first time Hedera has been named the most efficient DLT. A 2021 study by UCL also concluded that Hedera used the least amount of energy per transaction. That paper looked at the energy consumption of a number of the most popular POS blockchains, including Algorand, Cardano, Ethereum, Hedera, Polkadot, and Tezos. It also compared PoS energy consumption with Bitcoin Core and the Visa network.

The new paper includes significant updates, including a wider pool of PoS blockchains. This time around Avalanche, Elrond, Tron, NEAR, and Solana were included. The energy usage of post-merge Ethereum was also assessed.

The authors of the paper acknowledge that their research has some limitations that readers should keep in mind. One limitation was that the study only considered the energy consumption of validating nodes and did not take into account the energy consumption of non-validating nodes such as auxiliary nodes. Additionally, the study did not take into account transaction complexity, which can also affect energy consumption. Another limitation was that the study relied on estimates of energy consumption for some DLTs, rather than actual measurements of the hardware configurations in use. Finally, the study did not investigate the effects of moving from a permissioned to a permissionless DLT setting on energy consumption.

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