rust build requirements

[Jan Danielsson <jan.m.danielsson%gmail.com@localhost>]

Hello,

   I have read that building rust requires a ridiculous amount of 
memory, but I don't recall anyone specifying exactly how much that is. 
To limit wear and tear, I build all packages on a tmpfs, so I need the 
source, intermediate and target files to fit in memory.  What is a 
ballpark guesstimate on how much free RAM one would need to avoid 
swapping when building rust on NetBSD/adm64 8.1 using 4 cores?

--
Kind regards,
Jan Danielsson