In an effort to keep it on device, I tried switching to tree-sitter. I got it all compiled for iOS, and I did get it to just parse the javascript on device! However, it took 40 seconds to parse. Along with this, RAM usage went from 58MB -> 220MB. The 3GS (one of the current targets) only has 256MB, and if I ever even try on the 3G, that only has 128MBs of ram. This is very bad.

As much as it pains me, I think the best solution would likely be to have a server pick out the n/sig function, and have the device pull a json file or something which has the functions it needs. Kinda does ruin the “no server is involved” stuff with this, but that kinda does seem like the sacrifice I have to make unfortunately. Sadge :(