Feature request: streaming pretty-print output

[yairlenga]

I'm working with large JSON documents and would like to stream them to filehandle or socket without constructing the entire formatted string in memory.

Currently, output (regular and pretty-printed) appears to be generated by building strings and returning the final result. I'm wondering whether there would be interest in a streaming API that writes formatted JSON incrementally to a filehandle.

The motivation is:

• lower peak memory usage
• immediate time-to-first-byte
• support for very large JSON documents

I've been experimenting with a prototype formatter and would be happy to share ideas or contribute if this is something that might fit the project.

Would such a feature be of interest?

Possible API shapes could be something like encode_to, which can return the number of characters written, or undef on error.

$json->encode_to($fh, $data);