Hitchhiker’s Guide to the EVM
summary
Explains five concrete EVM optimizations: replace unused persistent mappings with events to save about 25,000 gas on a transfer, use constant/immutable to cut a read from ~2,500 gas to ~450, avoid repeated sload/sstore by caching to memory (saves ~500 gas in tested case due to EIP‑2929 cold/warm behavior), use smaller types like uint96 and reorder struct fields to pack slots (halves storage slots), and mark storage names so reads/writes are obvious.
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chapters (14)
- 0:00Introduction
- 0:30Topics
- 1:27Gas Golfing
- 4:29Dont Store
- 6:32Use Constants
- 8:27Make it Obvious
- 9:35Dont ReadWrite Too Often
- 12:41Pack Your structs
- 14:00Structure
- 14:41Storage
- 16:25Uint 96
- 17:26Two Slots
- 18:54Recap
- 19:51Outro
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