If your compiler wrote every variable into memory, every time you changed it, your code would run at least 3 times slower. Compilers generally do not worry abou

If your compiler wrote every variable into memory, every time you changed it, your code would run at least 3 times slower. Compilers generally do not worry about making sure the value of unallocated blocks of memory are what you expect, as there is no way to observe them within your program.