The author misses the crucial cost/benefits equation. How much is saved making the code more efficient? Now remember, their employer only cares about this in t

The author misses the crucial cost/benefits equation. How much is saved making the code more efficient? Now remember, their employer only cares about this in terms of their dollars. Vs. How much does it cost to make the program more efficient. Remember that every change risks introducing new bugs that could literally put a customer out of business.