Custom String vs D String performance

[Patric via Digitalmars-d-learn]

On Monday, 5 September 2016 at 11:53:12 UTC, Daniel Kozak wrote:
> Do you have windows or linux? Which version of dmd you have?

Now on my job pc:
DMD32 D Compiler v2.071.0-b2

In home i have 64 last version, and with my first version it 
shows the DString faster than my custom.