`[investigate]` gunnarmorling/hardwood

[harold]

https://github.com/gunnarmorling/hardwood

Relevant to parquet interests, @cnuernber.

Would be interesting to know how this compares / contrasts with the parquet code we currently use/have access to.

tech.v3.libs.parquet vs. java parquet vs. avro (?) vs. hardwood vs...

Thanks to @benkamphaus for the pointer.

[cnuernber]

It looks very good on initial inspection - row-oriented writes with columnar read.

[cnuernber]

No write side implemented yet but the reading looks great. Looking forward to their progress - no maven dependency at this point.