A method for identifying duplicate machine code function implementations provides for identifying position-dependent bits within a first function included in a first executable image and masking the identified position-dependent bits to create a position-independent entity. The method further provides for applying a hashing function to the position-independent entity to generate a representative hash code and comparing the representative hash code to a number of hash codes in a table to identify at least one duplicate implementation of the function that is associated in memory with a second executable image.