Stumbled upon an article by Tom Limoncelli. He starts with a programming question (skip that) but then goes into an interesting discussion of what’s really important.
Being focused primarily on networking this is the bit I liked most (another case of Latency Matters):
I once observed a situation where a developer was complaining that an operation was very slow. His solution was to demand a faster machine. The sysadmin who investigated the issue found that the code was downloading millions of data points from a database on another continent. The network between the two hosts was very slow. A faster computer would not improve performance.
The solution, however, was not to build a faster network, either. Instead, we moved the calculation to be closer to the data.