Prefix increments are cheaper than postfix increments

[code423n4]

Handle

robee

Vulnerability details

Prefix increments are cheaper than postfix increments.
Further more, using unchecked {++x} is even more gas efficient, and the gas saving accumulates every iteration and can make a real change
There is no risk of overflow caused by increamenting the iteration index in for loops (the ++i in for (uint256 i = 0; i < numIterations; ++i)).
But increments perform overflow checks that are not necessary in this case.
These functions use not using prefix increments (++x) or not using the unchecked keyword:

    change to prefix increment and unchecked: Incentivizer.sol, i, 144
    change to prefix increment and unchecked: Incentivizer.sol, i, 174
    change to prefix increment and unchecked: Incentivizer.sol, i, 190
    change to prefix increment and unchecked: Incentivizer.sol, i, 233

[kbrizzle]

Duplicate of: #34

[GalloDaSballo]

Duplicate of: #34