h4wkspeed comparison block time 2
    Updated 2025-03-04
    -- forked from speed comparison block time @ https://flipsidecrypto.xyz/edit/queries/cda97aa2-96ed-4b1c-96b9-4a82be65d64f

    -- ETH
    with eth_block as (
    select BLOCK_NUMBER, block_timestamp,
    datediff (second, lag(block_timestamp, 1) over (order by block_timestamp asc), block_timestamp) as block_time
    from ethereum.core.fact_blocks where block_timestamp > '2023-08-01'
    order by block_number
    )
    , eth_final as (
    select
    'Ethereum' as chain,
    -- date_trunc ('day', block_timestamp) as dates,
    avg (block_time) as avg_block_time

    from eth_block
    group by 1
    )

    -- Polygon
    , polygon_block as (
    select BLOCK_NUMBER, block_timestamp,
    datediff (second, lag(block_timestamp, 1) over (order by block_timestamp asc), block_timestamp) as block_time
    from polygon.core.fact_blocks where block_timestamp > '2023-08-01'
    order by block_number
    )
    , polygon_final as (
    select
    'Polygon' as chain,
    -- date_trunc ('day', block_timestamp) as dates,
    avg (block_time) as avg_block_time

    from polygon_block
    group by 1
    )

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