From this page you can take a step by step tour through each of the
operational steps of Impulse.
Only the main high level operations are discussed. In each section
there is accompanying descriptions of the parallel modifications that
were made and the performance gained. You can step along or jump
directly to a particular portion of the simulator.
Boxes such as this one contain information about various modifications
to the basic algorithm to achieve parallel execution and the results
of those changes.