Beedle - Oracle free perpetual lending

it's generally more gas-efficient to use assembly to check for a zero address (address(0)) than to use the == operator.

The reason for this is that the == operator generates additional instructions in the EVM bytecode, which can increase the gas cost of your contract. By using assembly, you can perform the zero address check more efficiently and reduce the overall gas cost of your contract.

Here's an example of how you can use assembly to check for a zero address:

In the above example, we have a function isZeroAddress that takes an address as input and returns a boolean value indicating whether the address is equal to the zero address. Inside the function, we convert the address to an integer using uint256(addr), and then use assembly to compare the integer to the zero address.

By using assembly to perform the zero address check, we can make our code more gas-efficient and reduce the overall cost of our contract. It's important to note that assembly can be more difficult to read and maintain than Solidity code, so it should be used with caution and only when necessary