https://issues.dlang.org/show_bug.cgi?id=20950

          Issue ID: 20950
           Summary: std.conv.text shouldn't needlessly allocate
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: stanislav.blinov@gmail.com

Since it's using an appender, it seems strange that it goes via the std.conv.to.

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