The author doesn't need to know the difference because the task manager is accurate by default. I can still offer you some reassurance:

- The Windows task manager's memory column is the private working set which is the actual memory used by the application minus shared memory (but only shared memory that is currently shared with other processes, not merely marked shared. I.E. it's similar to RES - SHR on Linux but it's more accurate)

- Windows doesn't overcommit memory. Memory that is reserved but unused (not touching all pages) by the app is truly wasted. I mention this because in your other comment you make it clear that you think this is happening. But Windows isn't Linux.