Test: none Change-Id: I7de9b98fea67084ec5b5ce5429f0a8f976341439
Refreshing some examples and references, and adding a new section on makefile performance debugging. Test: view in gitiles Change-Id: I747db67a16105fb738d87a6ead3f5d3e23bff7d0
Test: check gitiles view Change-Id: I2fa4fa5f7ee91ba586e1900542c8c334eb727a6b