coldRef:
coldRef is a measure of the number of memory accesses that are cold misses in the cache.

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

Bucket	Condition
Low	Any region of code that has more than one memory reference and isn't streaming through memory.
Medium	A region of code contains a mix of array initialization and memory references.
High	A region of coda that has a single memory access and streams through memory. This would mostly be seen in array initialization loops.

Example:
Consider the following code:

for (i=0; i<1000; i++)
   array[i] = 0;