OpenChainBench
Full benchmark: Fastest L2 block time, live across Arbitrum, Base, Optimism and 6 more
BlockchainsOptimism

Optimism block time

As of June 17, 2026, Optimism block time is 2.00 s at the median (p50, 24h window), with 2.02 s at p90 and 2.08 s at p99. Optimism ranks #4 of 9 chains measured on this benchmark.

Optimism block time is 2.00 s (p50, 24h). The OP Stack ships with a hard-coded 2 second sequencer interval, which is what the Optimism Foundation sequencer commits to; the L2 only produces a new block when that timer fires, even on empty traffic. Settlement is on Ethereum via blob calldata after Dencun. Measured by holding a persistent `newHeads` WebSocket against the public Optimism sequencer RPC and reporting the inter-arrival delta.

How Optimism compares

Live p50 over the last 24 hours across every chain on this benchmark, ranked lowest first.

  1. #1Arbitrum One251 ms
  2. #2Base2.00 s
  3. #3Blast2.00 s
  4. #4Optimism2.00 s
  5. #5Mantle2.00 s
  6. #6Taiko2.17 s
  7. #7Linea3.83 s
  8. #8zkSync Era4.60 s
  9. #9Scroll8.22 s

Methodology, charts and the full ledger live on the Fastest L2 block time, live across Arbitrum, Base, Optimism and 6 more page. Raw data: JSON endpoint.