I love this stuff. I'm currently working on a project where, left to my own devices, I would have come up with some complicated scheme that would reduce an O(n) (or even O(n^2)) task to O(log n). Fortunately, the guidelines I've been given (government, of course) offer a series of extremely-hard-to-understand-but-O(1) methods for retrieving the data. I haven't benchmarked it yet, but i'd imagine that my process would take about 5ms per record, and this process will probably take something on the order of 5 microseconds per record.

I'm learning all kinds of tricks that older developers can probably do in their sleep. Very cool.

(Note: the reason I say "older" instead of "experienced", even though for these purposes they're interchangeable, is that the tricks I'm learning are coming from a COBOL codebase written back in the 70s that I'm modernizing into Go.)

I also learned a long time ago that lookup tables for common requests are a no-brainer. If you only have 256 possible answers to a formula, just stick them in a lookup table.

Love it.