Memory Usage tracking

Issue Summary

I saw that you commented out code for displaying memory usage. If uncommented it because memory issues is the reason I installed your module. It seems to work however did you comment the code out because it there is something I should not trust in the output?

Also, it would be great if you could highlight a function that used more than some certain amount of memory just like you do with functions that take over x ms. Perhaps even highlight any function that pushed the total memory used close the the PHP memory usage limit.