faster "stringification"

[Orut via Digitalmars-d-learn]

On Sunday, 11 December 2016 at 02:46:58 UTC, Nicholas Wilson 
wrote:
>
> join performs allocations which is probably the reason for its 
> slowness. There is joiner (in std.algorithm.iterations) that 
> lazily performs the join, (though in the case of this 
> "benchmark" will be cheating because you don't do anything with 
> the result, print it to get a more fair comparison) avoiding 
> allocation.
>
> see also appender (in std.array) for fast concatenation.

Thanks, Stefan and Nicholas. I think joiner did the trick (for 
50M iterations, ~2s for D, ~17s for Python).