How do you optimize gas in Cairo with Uint256/felt?

Hey, I’m learning Cairo and I want to know more about Gas Optimization. In Solidity compiler, there is a difference between writing uint128 and uint256. Similarly to C and other languages, for example:

contract ThisIsNotAnOptimizedContract{
	uint128 Zero;
	uint256 One;
	uint128 Two;
}

contract ThisIsAGasOptimizedContract{
	uint128 Zero;
	uint128 Two;
	uint256 One;
}

uint128 variables each occupy a separate uint256just for themselves, wasting 128 bits for each slot (Like the first contract). The Solidity compiler puts 2 uint128 in the one 256-bit memory slot when they are declared next to each other.

I’m curious if there is any similar issue in Cairo. Uint256 uses two felt objects for low/high bits of the value.

struct Uint256 {
    // The low 128 bits of the value.
    low: felt,
    // The high 128 bits of the value.
    high: felt,
}

Is there any similar practice in Cairo to optimize felt and Uint256 objects to save some compiler steps?