Rust compiler's insane memory consumption

Hello!

Maybe this question would be more suitable
on comp.compilers, but I will give it a go
here.

A while back I tried to compile Thunderbird on
Fedora 41, having a laptop with 16GB of RAM.
Apart from one strange strike of luck, all of
my compilation attempts failed miserably.

The reason was that rustc, a Rust compiler,
hogged nearly 16GB of memory. Any compiler
experts around? How is it possible that
a Rust compiler can require that much memory?

I have a rough understanding of the phases
of how C compilers work, but I know practically
nothing of Rust. For the record, this is the
Rust compiler that I used:

~ $ rpm -qi rust
Name        : rust
Version     : 1.83.0
Release     : 1.fc41
Architecture: x86_64

br,
KK