What exactly the --allinst compiler flag does.

[realhet via Digitalmars-d-learn]

Hi,

I have some statements in my mind about --allinst, but I'm not 
sure they are correct or not.

1. Normally the compiler analyzes the full code with all the 
modules, and it only compiles code for template things that are 
used in the given code.

2. It is not needed for compiling the code with a single compiler 
instance, but is required for projects that are compiled in 
parallel by using multiple compiler instances.

Please someone tell me that these statements are valid or I know 
this wrong.  (These are just my speculations, feelings, I didn't 
find documentation on this.)