Gas Optimizations

[code423n4]

1

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L128

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L233

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L263

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L453

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L568

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L579

https://github.com/code-423n4/2022-05-cudos/blob/de39cf3cd1f1e1cf211819b06d4acf6a043acda0/solidity/contracts/Gravity.sol#L660

use ++i instead of i++ it can be reduce 5 gas per iteration. save the array length in local variable instead of accessing it in every iteration.