In Solidity 0.8+, there's a default overflow check on unsigned integers. It's possible to uncheck this in for-loops and save some gas at each iteration, but at the cost of some code readability, as this uncheck cannot be made inline.
- for (uint256 i; i < numIterations; i++) {
+ for (uint256 i; i < numIterations;) {
// ...
+ unchecked { ++i; }
}
These save around 25 gas saved per instance.
The same can be applied with decrements (which should use break when i == 0).
The risk of overflow is non-existent for uint256.
Context
VaultBorrowRate::getBorrowRate() LiquidationRouter::collaterals()
Description
In Solidity 0.8+, there's a default overflow check on unsigned integers. It's possible to uncheck this in for-loops and save some gas at each iteration, but at the cost of some code readability, as this uncheck cannot be made inline.
ethereum/solidity#10695
The change would be:
These save around 25 gas saved per instance. The same can be applied with decrements (which should use
breakwheni == 0). The risk of overflow is non-existent foruint256.