iampukar / solidity-gas-optimization

An awesome list of gas optimization techniques for smart contracts, with their relevant Proof of Concepts tested using Foundry.

Getting Started

curl -L https://foundry.paradigm.xyz | bash
foundryup
brew install libusb

Running Test

• Test all files

    forge test
  

• Test all files with traces

    forge test -vvvv
  

• Test for individual file

    forge test --match-path test/Arithmetic.t.sol
  

• Test for individual files with traces

    forge test --match-path test/Arithmetic.t.sol -vvvv
  

Gas Optimization

Title	Guide	Contract	Proof of Concept
Arithmetic & Bitwise Operators	Guide	Contract	PoC
Public vs External	Guide	Contract	PoC
Default Initialization (x)	Guide	Contract	PoC
Revert Strings	Guide	Contract	PoC
Redundant Checks	Guide	Contract	PoC
Nested If Statements	Guide	Contract	PoC
State Variable vs Local Variable	Guide	Contract	PoC
Packing Variables	Guide	Contract	PoC
Data Types	Guide	Contract	PoC
Addition	Guide	Contract	PoC
Garbage Collection	Guide	Contract	PoC
Swap	Guide	Contract	PoC
Call Data vs Memory	Guide	Contract	PoC
Immutable	Guide	Contract	PoC
Solidity Version	Guide
Unsigned Integer Comparision	Guide	Contract	PoC
Boolean	Guide
Custom Errors	Guide	Contract	PoC
Optimization	Guide
Use of Library	Guide
String vs Bytes32	Guide	Contract	PoC
Multiple Require	Guide	Contract	PoC
Loop Post Condition	Guide	Contract	PoC
Dead Code	Guide
Short Circuiting	Guide

References

1. https://betterprogramming.pub/how-to-write-smart-contracts-that-optimize-gas-spent-on-ethereum-30b5e9c5db85?gi=227bef2ca134
2. https://mudit.blog/solidity-gas-optimization-tips/
3. https://blog.polymath.network/solidity-tips-and-tricks-to-save-gas-and-reduce-bytecode-size-c44580b218e6
4. https://gist.github.com/hrkrshnn/ee8fabd532058307229d65dcd5836ddc
5. https://medium.com/coinmonks/8-ways-of-reducing-the-gas-consumption-of-your-smart-contracts-9a506b339c0a
6. https://ethereum.stackexchange.com/questions/28813/how-to-write-an-optimized-gas-cost-smart-contract
7. https://forum.openzeppelin.com/t/a-collection-of-gas-optimisation-tricks/19966
8. https://medium.com/coinmonks/8-ways-of-reducing-the-gas-consumption-of-your-smart-contracts-9a506b339c0a