Blockchain By Example

Potential optimization

The opcode gas prices give us an idea about which operations to use with moderation. For instance, reading from storage costs 200 gas per SLOAD instruction, and writing to storage SSTORE costs 5,000 gas, but reading from the EVM's memory and writing to it costs only 3 gas. Therefore, it's preferable to avoid extensive reading/writing operations from and into storage but instead use the memory.

The cost also depends on data size, with the fee being 20,000 gas to store a 256-bit word. For example, a kilobyte (8,000 bits) costs 640k gas, and with a gas price of 18 Gwei, you'll have to pay 11,520,000 Gwei (0.01152 Ether), or about 6.8659 USD (at 595.997$ per ether), making Ethereum an expensive storage infrastructure. Another ...