[foresto]

From memory, I think LineageOS 17 took roughly 8-12 hours for an initial build and 3.5 hours for subsequent (ccache) builds on an Intel i5-3570K and spinning hard drive. That's not including the initial git clone.

The idea might seem daunting, but assuming midrange hardware and a decent net connection, it's very much doable in under a day without resorting to cloud services.

[correcthorse123]

How would it scale with the number of cores? 3950x should make relatively short work of it, or wouldn't it?

[foresto]

I would expect it to scale pretty well, at least until you reach the limits of your disk and buffer RAM.

The build process supports the -j option just like make. You can use -j N+1 if you want to keep all your cores busy, or -j N-1 to keep your machine more responsive during the build, or nice and -j 1 if you're in no hurry and your machine has more important tasks. (Actually, I think reasonable defaults for these might already be part of the build scripts, but it has been a while since I looked.)

[danvittegleo]

It scales amazingly well with the number of cores you throw at it. Definitely the 3950x would work great.

[BorisMelnik]

that should tear through it. the linux kernel for instance compiles much better with higher number of cores