Comparacao de codigo gerado por IF vs SWITCH

    // c++ source ====================================================================

    int a = 0;

    {
        if( a == 0 )
            a = 1;
        else if( a == 1 )
            a = 2;
        else
            a = 0;
    }

    {
        switch( a )
        {
        case 0:
            a = 1; break;
        case 1:
            a = 2; break;
        default:
            a = 0;
        }
    }

    // disassembly ====================================================================

    int a = 0;
00A713BE  mov         dword ptr [a],0

    {
        if( a == 0 )
00A713C5  cmp         dword ptr [a],0
00A713C9  jne         wmain+34h (0A713D4h)
            a = 1;
00A713CB  mov         dword ptr [a],1
00A713D2  jmp         wmain+4Ah (0A713EAh)
        else if( a == 1 )
00A713D4  cmp         dword ptr [a],1
00A713D8  jne         wmain+43h (0A713E3h)
            a = 2;
00A713DA  mov         dword ptr [a],2
        else
00A713E1  jmp         wmain+4Ah (0A713EAh)
            a = 0;
00A713E3  mov         dword ptr [a],0
    }

    {
        switch( a )
00A713EA  mov         eax,dword ptr [a]
00A713ED  mov         dword ptr [ebp-0D0h],eax
00A713F3  cmp         dword ptr [ebp-0D0h],0
00A713FA  je          wmain+67h (0A71407h)
00A713FC  cmp         dword ptr [ebp-0D0h],1
00A71403  je          wmain+70h (0A71410h)
00A71405  jmp         wmain+79h (0A71419h)
        {
        case 0:
            a = 1; break;
00A71407  mov         dword ptr [a],1
00A7140E  jmp         wmain+80h (0A71420h)
        case 1:
            a = 2; break;
00A71410  mov         dword ptr [a],2
00A71417  jmp         wmain+80h (0A71420h)
        default:
            a = 0;
00A71419  mov         dword ptr [a],0
        }
    }