Lld is an ultra fast ld linker "dropin" alternative...
LLD is a linker from the LLVM project. That is a drop-in replacement for system linkers and runs much faster than them. It also provides features that are useful for toolchain developers.
There are a few ways to tell compiler drivers to use ld.lld instead of the default linker.
The easiest way to do that is to overwrite the default linker. After installing LLD to somewhere on your disk, you can create a symbolic link by doing ln -s /path/to/ld.lld /usr/bin/ld so that /usr/bin/ld is resolved to LLD.