Article: Increasing the D Compiler Speed by Over 75%

[Richard Webb]

Another little observation:

Dsymbol::toPrettyChars() potentially calls toChars() twice on each 
symbol (so it creates 2 copies of the string representation).
Some instances of toChars() just return a literal string, but for 
templates it can do a bunch of work. Doesn't sounds like the most 
efficient approach?


Saying that though, it looks like a lot of the calls to that are to 
build error strings that are never displayed because errors are gagged, 
which doesn't sound ideal either?