Inherent code performance advantages of D over C?

["Luís]

On Sunday, 8 December 2013 at 01:34:34 UTC, Walter Bright wrote:
> Needing a tool to refactor code is a bit of a mystery to me. 
> I've never used one, and never felt that not having one 
> inhibited me from refactoring.

Do you include renaming a variable as refactoring? I'm sure you 
can appreciate that having a tool automate that process reduces 
errors, and is faster (a generic text replace function is 
dangerous).