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Loop Optimization

Standard

Faster

Fastest

function doStandard()
{
   /* common code */

   for (l=1;l<iterations+1;l++)
   {
      testVal++;
   }

   /* common code */
}

function doFast()
{
   /* common code */

   l = iterations;
   do
   {
      testVal++;
   } while (--l);

   /* common code */
}

function doFastest()
{
   /* common code */

   n = iterations % 8;
   while (n--)
   {
      testVal++;
   }

   n = parseInt(iterations/8);
   while (n--)
   {
      testVal++;
      testVal++;
      testVal++;
      testVal++;
      testVal++;
      testVal++;
      testVal++;
      testVal++;
   }

   /* common code */
}

Loop Optimization

This three stage demo shows the optimization of loop programming. The three different functions are displayed above but we suggest you view the source...