⌛General Stats

Below we have gathered information from rollup.codes about some general information about different rollups together to provide a comprehensive overview and comparison between these approaches.

1. Block Time:

   • The time interval between the creation of consecutive blocks in a blockchain. In Layer 2s, block time can be significantly shorter than on Ethereum's Layer 1, allowing for faster transaction processing.

2. Gas Limit / Block:

   • The maximum amount of computational effort (gas) that can be expended in a single block on Layer 2. This limit helps manage the block's size and the speed of block processing.

3. *Gas Target / Block:

   • Similar to the gas limit, this is a softer cap or target for the amount of gas usage per block. Layer 2s might use this to guide block producers towards an ideal block size based on EIP-1559.

   Read more here: What EIP 4844 means for Layer 2s

4. Sequencing Frequency:

   • The frequency at which the rollup posts L2 transactions on Ethereum L1. The time varies based on the amount of calldata that must be posted on L1

5. Finality:

   • The time it takes for transactions to be considered irreversible. In Layer 2s, finality often depends on the underlying Layer 1 blockchain (Ethereum), as Layer 2s periodically commits state updates to Layer 1.

Metrics	Ethereum	OP Mainnet (Optimistic, EVM)	Base (optimistic, EVM)	Linea (zk, EVM)	Arbitrum One (Optimistic, EVM)	Polygon zkEVM	zkSync Era (ZK, EVM)
Block Time	12 seconds	2 seconds	2 seconds	12 seconds	250ms	Irregular*	5 seconds
Gas Limit / Block	30 million	30 million	30 million	61 million	32 million	30 million	80 million
Gas Target/ Block*	15 million	5 million	5 million	-	-	-	-
Layer 2 Base Fee	-	to be added	to be added	to be added	to be added	to be added	to be added
Sequencing Frequency	-	0.5 - 2 minutes	0.5 - 2 minutes	0.5 - 2 minutes	0.5 - 2 minutes	~4-8 minutes	~6-15 minutes
Finality	12-13 minutes	7 days	7 days	8 - 32 hours	7 days	~1 hour	24 hours