[throwaway_45]

A bootcamp person can learn most of these things. It just seems with some of our recent hires they don't seem to want to learn this stuff or maybe it doesn't really matter for react devs.

And these things do make a difference. L1 cache is faster than L2 cache which is faster than L3 which is faster than memory which is faster than hard disk etc. You want your code to keep things within those limits to make things faster.

Or for example if you start using virtual memory and paging to disk you might want to switch algorithms. For example you might want to use merge sort instead of quick sort if you don't have a lot of ram and you have to go to disk. However if you have 128GB of memory and mostly randomized data you want to use quicksort.

This is kind of trivial example, but I think this stuff is somewhat important.