DittoETH

##summary
The majority of Solidity for loops increment a uint256 variable that starts at 0.

Vulnerability Details

These increment operations never need to be checked for over/underflow because the variable will never reach the max number of uint256 (will run out of gas long before that happens). The default over/underflow check wastes gas in every iteration of virtually every for loop.

Impact

Using unchecked blocks to save gas

Tools Used

vscode

Recommendations

Increments in for loop can be unchecked (save 30-40 gas per loop iteration)

instead of this

for (uint256 i = 0; i < size; i++)

make it

for (uint256 i = 0; i < size;)

unchecked {
++i;
}