Most performant way of converting int to string

Ivan Kazmenko via Digitalmars-d-learn digitalmars-d-learn at
Thu Dec 24 10:01:44 PST 2015

On Tuesday, 22 December 2015 at 19:50:28 UTC, Daniel Kozák wrote:
> V Tue, 22 Dec 2015 18:39:16 +0000
> Ivan Kazmenko via Digitalmars-d-learn
> <digitalmars-d-learn at> napsáno:
>> Does DMD, or Phobos function to!(string), do anything like 
>> that? The number of possible bases is not large anyway.  I've 
>> heard major C/C++ compilers do that, but have not looked for a 
>> proof myself.
> Yes, IIRC, all D compilers should be able to change modulus and 
> division to few additions, subtractions and bit shifts if base 
> is known at compile time.
> And phobos use this: 

So, in a few common cases (bases 10 and 2, 4, 8, 16), you convert 
a runtime argument into a compile-time argument for the 
implementation function, and there, division is optimized at 
compile time.  Nice!

More information about the Digitalmars-d-learn mailing list