Gas Optimizations

[code423n4]

Use memory variable to store decimals()

Affected code

• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/IndexLogic.sol#L78
• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/IndexLogic.sol#L79

Use newWeight != 0 instead of newWeight > 0

Affected code

• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/ManagedIndexReweightingLogic.sol#L61

Use _totalSupply != 0 instead of _totalSupply > 0

Affected code

• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/vToken.sol#L160

Use uint _balance = oldShares instead of uint _balance = _NAV.balanceOf[_account]

Affected code

• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/vToken.sol#L161

Add condition (i != 0) to if block

Affected code

• https://github.com/code-423n4/2022-04-phuture/blob/594459d0865fb6603ba388b53f3f01648f5bb6fb/contracts/TrackedIndex.sol#L38

Proof of concept

• Because maxCapitalization is initialized with value _capitalization[0], so we don't need to check if _capitalizations[i] > maxCapitalization if i == 0