Instead of 3 separate swaps (450 calls each), execute all 3 in one transaction using a batch router. You pay 1 base fee instead of 3. Professional MEV searchers use Flash Bots for batching.
Submit trades during low-congestion blocks. Monday 3am UTC has gas at $10-20/gwei. Friday 8pm UTC peaks at $100+/gwei. Bots monitor pending mempool and batch trades between blocks to reduce competition.
Flash Bots Protect and MEV-Resistant RFQ systems let you submit transactions privately. No frontrunning, no sandwich attacks. 1-5% protection cost is often cheaper than the slippage from public mempool.
Shorten function names, compress token addresses, use bitwise operations. 100 bytes of calldata = 1,600 gas. Pros save 1,000-2,000 gas by reducing data size. Sounds small, but adds up across 100 trades daily.
Arbitrum/Optimism gas costs $0.10-0.50 vs Ethereum's $5+. Smaller trades become profitable. Execute 50 arbitrages on L2 for the cost of 5 on L1. Then bridge profits back to Ethereum.
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