Why C++ compiles slowly

[Walter Bright]

Steven Schveighoffer wrote:
> I get a long list of functions proceeding at a reasonable rate.  I've 
> done that in the past, I feel it's some sort of inner loop problem.  
> Essentially, something takes way longer to compile than it should, but 
> way longer on the order of .05 seconds instead of .005 seconds, so you 
> don't notice it normally.  But somehow my library is able to harness 
> that deficiency and multiply by 1000.
> 
> I don't know, it doesn't seem like dcollections should evoke such a long 
> compile time.

with or without -O ?