Most efficient way to find the greatest of three ints

Question

Below is my pseudo code.

function highest(i, j, k)
{
  if(i > j && i > k)
  {
    return i;
  }
  else         


        

Answer 1

Your current method: http://ideone.com/JZEqZTlj (0.40s)

Chris's solution:

int ret = max(i,j);
ret = max(ret, k);
return ret;

http://ideone.com/hlnl7QZX (0.39s)

Solution by Ignacio Vazquez-Abrams:

result = i;
if (j > result)
  result = j;
if (k > result)
  result = k;
return result;

http://ideone.com/JKbtkgXi (0.40s)

And Charles Bretana's:

return i > j? (i > k? i: k): (j > k? j: k);

http://ideone.com/kyl0SpUZ (0.40s)

Of those tests, all the solutions take within 3% the amount of time to execute as the others. The code you are trying to optimize is extremely short as it is. Even if you're able to squeeze 1 instruction out of it, it's not likely to make a huge difference across the entirety of your program (modern compilers might catch that small optimization). Spend your time elsewhere.

EDIT: Updated the tests, turns out it was still optimizing parts of it out before. Hopefully it's not anymore.

Answer 2

How about

return i > j? (i > k? i: k): (j > k? j: k);

two comparisons, no use of transient temporary stack variables...