Gas Testing for Libraries Public vs Internal

TestGas.solidity

pragma solidity ^0.4.21;

library TestLibPublic {
  struct Data {
    uint n;
  }

  function Set(Data storage self, uint a) public {
    self.n = a;
  }

  function Get(Data storage self) view public returns(uint)  {
    return self.n;
  }
}
library TestLibInternal {
  struct Data {
    uint n;
  }

  function Set(Data storage self, uint a) internal {
    self.n = a;
  }

  function Get(Data storage self) view internal returns(uint)  {
    return self.n;
  }
}

contract StorageOnePublic {
  using TestLibPublic for TestLibPublic.Data;
  TestLibPublic.Data data;
  address public owner;

  function StorageOne() public {
    owner = msg.sender;
    data.Set(5);
  }

  function GetData() external view returns(uint) {
    return data.Get();
  }
}

contract StorageOneInternal {
  using TestLibInternal for TestLibInternal.Data;
  TestLibInternal.Data data;
  address public owner;

  function StorageOne() public {
    owner = msg.sender;
    data.Set(5);
  }

  function GetData() external view returns(uint) {
    return data.Get();
  }
}