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//$Id$
#include "ace/OS_NS_string.h"
#include "ace/High_Res_Timer.h"
#include "test_config.h"
void*
smemcpy( void* dest, const void* src, const size_t n)
{
unsigned char* to = static_cast<unsigned char*>( dest) ;
const unsigned char* from = static_cast<const unsigned char*>( src) ;
// Unroll the loop...
switch( n) {
case 16: to[ 15] = from[ 15] ;
case 15: to[ 14] = from[ 14] ;
case 14: to[ 13] = from[ 13] ;
case 13: to[ 12] = from[ 12] ;
case 12: to[ 11] = from[ 11] ;
case 11: to[ 10] = from[ 10] ;
case 10: to[ 9] = from[ 9] ;
case 9: to[ 8] = from[ 8] ;
case 8: to[ 7] = from[ 7] ;
case 7: to[ 6] = from[ 6] ;
case 6: to[ 5] = from[ 5] ;
case 5: to[ 4] = from[ 4] ;
case 4: to[ 3] = from[ 3] ;
case 3: to[ 2] = from[ 2] ;
case 2: to[ 1] = from[ 1] ;
case 1: to[ 0] = from[ 0] ;
case 0: return dest ;
default: return ACE_OS::memcpy( dest, src, n) ;
}
}
void
testit( int type)
{
char buffer[16] ;
size_t size = 16 ;
switch( type) {
case 0: smemcpy( (void*)buffer, (void*)" THIS IS A TEST", size) ; break ;
case 1: ACE_OS::memcpy( (void*)buffer, (void*)" THIS IS A TEST", size) ; break ;
}
}
namespace { enum { ITERATIONS = 100000000 } ; }
int
run_main (int, ACE_TCHAR *[])
{
ACE_START_TEST (ACE_TEXT ("Memcpy_Test"));
//ACE_Time_Value start, now ;
struct timeval start, now;
for (int i = ITERATIONS ; i > 0 ; --i) {
testit(0) ;
}
start = ACE_High_Res_Timer::gettimeofday_hr ();
for (int j = ITERATIONS ; j > 0 ; --j) {
testit(0) ;
}
now = ACE_High_Res_Timer::gettimeofday_hr () ;
double fast = 1000000 * (now.tv_sec - start.tv_sec) +
now.tv_usec - start.tv_usec ;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("%f uSec per iteration for fast version.\n"),
fast / ITERATIONS
)) ;
start = ACE_High_Res_Timer::gettimeofday_hr () ;
for (int k = ITERATIONS ; k > 0 ; --k) {
testit(1) ;
}
now = ACE_High_Res_Timer::gettimeofday_hr () ;
double slow = 1000000 * (now.tv_sec-start.tv_sec) + now.tv_usec - start.tv_usec ;
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("%f uSec per iteration for slow version.\n"),
slow / ITERATIONS
)) ;
ACE_END_TEST;
return 0 ;
}
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