Builder.rs optimization in unixfs...?

[laudiacay]

I was looking at builder.rs in iroh-unixfs and noticed a bit of duplicated/easily condensable code, and also some optimizations in the case where there are a lot of files in a lot of directories (for example, pib-scale scientific repositories with piles of autogenerated files- I'm writing a really fast data preparer for filecoin onboarding)

This isn't done yet, but when it is, if you want me to integrate it, i can submit a PR? lmk if you think this matters enough to spend time on it, i don't want to waste either of our time with insane premature optimization on something that probably isn't as fast-path for you as it is for me.

will ping when done