Delphi fast plus big integer?

Question

function AddNumStrings (Str1, Str2 : string): string;
var
  i : integer;
  carryStr : string;
  worker : integer;
  workerStr,s : string;

  begin
  Result := inttos         


        

Answer 1

1. INT128 lib for FPC
2. GNURZ lib (for FPC but should be compatible with Delphi)
3. GMP (FPC supports it, Delphi also)
4. BigInt and BigFloat
5. BigInt Delphi Library
6. Another BigInt
7. TPMath
8. DeHL for Delphi
9. BigNumbers BigInteger, BigDecimal and BigRational for Delphi

Hopefully one of those will be faster...