How is std.regex.replaceAllInto more efficient?

[Shriramana Sharma via Digitalmars-d]

Dmitry Olshansky wrote:

> Feel free to improve on the examples, I'd gladly pull such patches.

How about this, using the "comifying" regex from the replaceAll example:

    auto re = ctRegex!(`(?<=\d)(?=(\d\d\d)+\b)`, "g");
    auto sink = appender!(char [])();
    foreach (line; stdin.byLine())
    {
        sink.clear();
        replaceAllInto(sink, line, re, ",");
        writeln(sink.data());
    }

-- 
Shriramana Sharma, Penguin #395953