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golf-course

A list of common Solidity optimization tips and myths.

Tips

Right Shift Instead of Dividing By 2

The SHR opcode is 3 gas cheaper than DIV and also bypasses Solidity's division by 0 prevention overhead.

// Unoptimized:
uint256 two = 4 / 2;

// Optimized:
uint256 two = 4 >> 1;

Myths