Me: I should continue that reasonably straightforward coding
Brain (wearing a ridiculous hat): Or, and bare with me for a second here, or you could create a spreadsheet to tease out a formula that decides the exact point in which it's worth creating an index map in go when trying to determine whether all items in slice A are contained within slice B
Me: But I've got a...
Brain: Shhhhhpreadsheet
30 minutes later (spongebob background)
Me: Ok so brute force requires less work until slice 1 has 5 items and slice 2 has 9 or 10 and then the benefits increase linearly
Brain: Haven't you got work to do?