Gas Optimizations

Use `calldata` instead of `memory`:

https://github.com/code-423n4/2022-04-phuture/blob/main/contracts/UniswapV2PathPriceOracle.sol#L23

For external function's dynamic params, calldata is the cheapest location to use.

Recommended Mitigation Steps:

Change params memory to calldata

Use Custom Errors to save Gas:

Custom errors from Solidity 0.8.4 are cheaper than require messages. https://blog.soliditylang.org/2021/04/21/custom-errors/

`++i` use less gas than `i++`:

./contracts/UniswapV2PathPriceOracle.sol
  line: 34   for (uint i = 0; i < path.length - 1; i++) {
  line: 49   for (uint i = 0; i < path.length - 1; i++) {

++i can save some gas use it like other places in code.

code-423n4 / 2022-04-phuture-findings

Gas Optimizations #59

Gas Optimizations

Use `calldata` instead of `memory`:

Recommended Mitigation Steps:

Use Custom Errors to save Gas:

`++i` use less gas than `i++`:

code-423n4 / 2022-04-phuture-findings

Gas Optimizations #59

Gas Optimizations

Use calldata instead of memory:

Recommended Mitigation Steps:

Use Custom Errors to save Gas:

++i use less gas than i++:

Use `calldata` instead of `memory`:

`++i` use less gas than `i++`: