feat(SequencerInbox): gas optimization #22
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LGTM tho will merge later since this included a storage modification |
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PR is stale, optimization is now in #68 |
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This PR simply packs the MaxTimeVariation members into a single slot.
Each time the sequencer posts a batch, the time boundary is calculated accessing each member of MaxTimeVariation.
Timestamps fit in uint32 data types, this is sufficient for atleast 80 years. I see uint64 is the time data type convention used in the repo so this is suitable for the MaxTimeVariation.delaySeconds/futureSeconds.
Regarding blocktime, even if Arbitrum settled on BSC (~3 second block time) or Solana (400 millisecond block time), uint64 is more than sufficient for million millions of years.
This PR saves approximately 6300 gas per sequencer batch posted --- about 2 billion gas, or 20 - 60 eth since Nitro launched.