Visual weight of primary and secondary action buttons

Pretty interesting observation on why the irreversible, permanent action should become the secondary button:

http://uxmovement.com/buttons/the-visual-weight-of-primary-and-secondary-action-buttons/

Heap profiling on chrome

Neat: http://code.google.com/chrome/devtools/docs/heap-profiling.html
It's becoming more important when you move to resource limited devices, such as pads and phones.