/*
Author::name("Talles H");
License::type("HaveFun");
*/
#include <iostream>
#include <time.h>
class
test_stmt_perform
{
public:
long int
k = 0, //Bah
z = 0;
// Test com IF agrupado
int test_if_group (unsigned int var)
{
if (var < 6)
{
if (var == 1)
z++;
else if (var == 2)
z--;
else if (var == 3)
z--;
else if (var == 4)
z--;
else
z--;
}
else if (var < 11)
{
if (var == 6)
z--;
else if (var == 7)
z--;
else if (var == 8)
z--;
else if (var == 9)
z--;
else
z--;
}
else if (var < 14)
{
if (var == 11)
z--;
else if (var == 12)
z--;
else
z--;
}
if (var == 14)
z--;
else if (var == 15)
z--;
else if (var == 16)
z--;
else if (var == 17)
z--;
else if (var == 18)
z++;
else if (var == 19)
z--;
else if (var == 20)
z--;
else if (var == 21)
z--;
else if (var == 22)
z++;
}
// Teste com Array de Goto
int
test_goto (unsigned int var)
{
void *go[] =
{
&&go1, &&go2, &&go3, &&go4, &&go5, &&go6, &&go7, &&go8, &&go9,
&&go10, &&go11, &&go12, &&go13, &&go14, &&go15, &&go16, &&go17, &&go18,
&&go19, &&go20, &&go21, &&go22
};
goto *go[var];
go1:
k++;
goto end;
go2:
k++;
goto end;
go3:
k++;
goto end;
go4:
k++;
goto end;
go5:
k++;
goto end;
go6:
k++;
goto end;
go7:
k++;
goto end;
go8:
k++;
goto end;
go9:
k++;
goto end;
go10:
k--;
goto end;
go11:
k++;
goto end;
go12:
k++;
goto end;
go13:
k++;
goto end;
go14:
k++;
goto end;
go15:
k++;
goto end;
go16:
k++;
goto end;
go17:
k++;
goto end;
go18:
k--;
goto end;
go19:
k++;
goto end;
go20:
k++;
goto end;
go21:
k++;
goto end;
go22:
k++;
goto end;
end:
return 0;
}
// Teste com if sequencial
int
test_if_seq (unsigned int var)
{
if (var == 1)
z++;
else if (var == 2)
z--;
else if (var == 3)
z--;
else if (var == 4)
z--;
else if (var == 5)
z--;
else if (var == 6)
z--;
else if (var == 7)
z--;
else if (var == 8)
z--;
else if (var == 9)
z--;
else if (var == 10)
z--;
else if (var == 11)
z--;
else if (var == 12)
z--;
else if (var == 13)
z--;
else if (var == 14)
z--;
else if (var == 15)
z--;
else if (var == 16)
z--;
else if (var == 17)
z--;
else if (var == 18)
z++;
else if (var == 19)
z--;
else if (var == 20)
z--;
else if (var == 21)
z--;
else if (var == 22)
z++;
return 0;
}
// Teste com switch - Jump Table
int
test_switch (unsigned int var)
{
switch (var)
{
case 1:
z++;
break;
case 2:
z--;
break;
case 3:
z--;
break;
case 4:
z--;
break;
case 5:
z--;
break;
case 6:
z--;
break;
case 7:
z--;
break;
case 8:
z--;
break;
case 9:
z--;
break;
case 10:
z--;
break;
case 11:
z--;
break;
case 12:
z--;
break;
case 13:
z--;
break;
case 14:
z--;
break;
case 15:
z--;
break;
case 16:
z--;
break;
case 17:
z--;
break;
case 18:
z--;
break;
case 19:
z--;
break;
case 20:
z--;
break;
case 21:
z--;
break;
case 22:
z--;
break;
}
return 0;
}
};
#define MELHOR_CASO 1 // Best case
#define PIOR_CASO 22 // Worst case
#define MEIO_CASO 11 // Middle
int
main (int argc, char *argv[])
{
const unsigned int
NUM_ELEMENTS = 900000000, // Cycles
TEST_VALUE = MELHOR_CASO; // Test
unsigned int
old, // Time
count; // Loop
long double
secs;
test_stmt_perform
test; // Class
/* Teste IF Agrupado. */
old = clock ();
for (count = 0; count < NUM_ELEMENTS; count++)
{
test.test_if_group (TEST_VALUE);
}
old = clock () - old;
secs = ((long double) old) / CLOCKS_PER_SEC;
std::cout << "TIME::IF(G) ::" << secs << " seconds)\n";
/* Fim do teste. */
/* Teste IF sequencial */
old = clock ();
for (count = 0; count < NUM_ELEMENTS; count++)
{
test.test_if_seq (TEST_VALUE);
}
old = clock () - old;
secs = ((long double) old) / CLOCKS_PER_SEC;
std::cout << "TIME::IF(S) ::" << secs << " seconds)\n";
/* Fim do teste. */
/* Teste Array de Goto */
old = clock ();
for (count = 0; count < NUM_ELEMENTS; count++)
{
test.test_goto (TEST_VALUE-1);
}
old = clock () - old;
secs = ((long double) old) / CLOCKS_PER_SEC;
std::cout << "TIME::GOTO ::" << secs << " seconds)\n";
/* Fim do teste. */
/* Teste switch - Jump Table */
old = clock ();
for (count = 0; count < NUM_ELEMENTS; count++)
{
test.test_switch (TEST_VALUE);
}
old = clock () - old;
secs = ((long double) old) / CLOCKS_PER_SEC;
std::cout << "TIME::SWCH ::" << secs << " seconds)\n";
/* Fim do teste. */
return 0;
}
