Microsoft once used its own brand of 'Lego' to optimize Windows

People of a certain age sometimes like to reminisce about how software in the old days was somehow more responsive and more efficient on far less powerful hardware. Microsoft's approach was to take its software binaries and optimize the heck out of them. Former Microsoft engineer Dave Plummer spilled the beans on the practice, confirming that the company used an internal application called Basic Block Tool (BBT) – known internally as Microsoft Lego – to shuffle the internals of binar