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I was thinking about caches and evaluating what calculations I want to do.
I fixed a project for someone simulating a machine. That took them almost 9 minutes. Simply replacing the part where they initialised a solver and used it to find a zeropoint of a quadratic function with a call to that initialiser got it down to a minute.
You should have seen their faces when we put the quadratic formula in and it took 28 seconds.
Have you talked to 17 year olds? They are far from developed in most cases. Anyone even in their late 20s should notice the difference in development and stay clear.