How to bake render compositing nodes in Blender

This Blender tutorial covers methods for bake rendering compositing nodes and ways to speed up render times. We will pre-render the objects and save the precious time when rendering animations. We'll discover the challenges that we meet (such as missing specular in the baked texture) and suggest workarounds.
We'll spend some quality time with the node editor.
Finally, let's tweak OSA and Octree resolution. The result? Reducing the render time from 2 minutes to 17 seconds - 7 times faster!