Help optimize D solution to phone encoding problem: extremely slow performace.

[Renato]

On Wednesday, 17 January 2024 at 10:24:31 UTC, Renato wrote:
>
> It's not Java writing the file, it's the bash script 
> [`benchmark.sh`](https://github.com/renatoathaydes/prechelt-phone-number-encoding/blob/master/benchmark.sh#L31):
>
> ```
> java -cp "build/util" util.GeneratePhoneNumbers 1000 > 
> phones_1000.txt
> ```
>

Perhaps using this option when running Java will help:

```
java -DFile.Encoding=UTF-8 ...
```