parallelising the build helps, but RAM is also a big factor here since if you come short (which is more likely to happen when parallelising) swapping will make things grind.
if you're lucky enough to have enough RAM to spare (which would be, like, a lot!) you can also build in a tmpfs ramdisk!
The laptop has 32 GB and the amount of RAM is not a limit here. With sufficiently fast SSD the storage is not a limiting factor either. Even RAM speed is not a big factor, it is still single thread performance that affects compilation speed for C++ most. Well, at least for the type of C++ that Chromium uses.
