from my experience its about the speed of a very competant human - one of my favorite custom tools ive written is just access to a series of bash commands - havent tested with others but claude very quickly browses through files, reads them, and so on to do whatever it was you prompted. But even then it is all contextual - for example, I had to remove 'find' because as one would expect, running 'find' against a huge directory set is very slow!