My learnings about speed:
* people tend to not measure things and when they actually do bother they tend to measure the wrong things, the things of immediate comfort
* measurements, when executed correctly, are objective with numeric evidence, thus some people are wholly incapable of measuring things for the same reasons some people cannot introspect
* people tend to guess at measures because either they are incapable or the effort is too high
* when people guess at measures they tend to be wrong more than 80% of the time and when they are wrong they tend to be wrong by multiple orders of magnitude
* measurements tend to produce micro-improvements, but those micro-improvements add up in ways that are both significant and unexpected
* if you want to go faster the most certain course of action is to modify your technology and techniques
* hiring is slow, just as adding more people to a late project makes it slower
* changes lower in the stack tend to grant both increased speed and increased flexibility. Increased scale comes from what you do with those