sqrt:
sqrt is the ratio of the number of floating point square root instructions to the total number of floating point instructions.

Classifying sqrt:
sqrt can be classified into low, medium or high as follows:

Bucket	Condition
Low	The region of code contains no sqrt instructions. OR 1 or fewer operations out of every 4 floating point instructions is a sqrt instruction.
Medium	1 out of every 2 floating point instructions is a sqrt instruction.
High	2 or more instructions out of every 3 floating point instructions is a sqrt instruction.

Example 1:
Consider the following code:

for (i=0; i<1000; i++)
   result[i] = sqrtf(arrayOne[i]) * sqrtf(arrayTwo[i]);

Example 2:
Let's look at another example:

for (i=0; i<1000; i++)
   x1 = arrayOne[i].x;
   y1 = arrayOne[i].y;
   z1 = arrayOne[i].z;
   x2 = arrayTwo[i].x;
   y2 = arrayTwo[i].y;
   z2 = arrayTwo[i].z;

   result[i] = sqrtf((x1-x2)*(x1-x2) + (y1-y2)*(y1-y2) + (z1-z2)*(z1-z2));