Viewing profile — gunnarmorling

I haven't looked at parquet-rs specifically, but I can't think of any reason why it couldn't implement this kind of optimization.

Yeah, with that machine spec, I think if anything, the post goes to show that LISTEN/NOTIFY does actually _not_ scale well. A CDC-based solution would give you a multiple of these …

Related piece I wrote some time ago: https://www.morling.dev/blog/building-durable-execution-engi...

Thanks! The heavy dependency footprint of parquet-java was the main driver for kicking off this project. Hardwood doesn't have any mandatory dependencies; any libs for compression …

Yes, absolutely, DuckDB is great. But I think there's a space and need for a pure Java library.

Thanks! See https://news.ycombinator.com/item?id=47206861 for some general comments on performance. I haven't measured bit unpacking specifically yet.

We have some first benchmarks here: https://github.com/hardwood-hq/hardwood/blob/main/performanc... . From the post: > As an example, the values of three out of 20 columns of the N…

I am working on a new Java parser for the Apache Parquet file format, with minimal dependencies and multi-threaded execution: https://github.com/hardwood-hq/hardwood . Approaching …

Nice one, great to see this addition to the Rust ecosystem! Reading through the README, this piqued my curiosity: > Small or fast transactions may share the same WAL position. I do…

Oh nice, thanks for providing that data! Made it to #369 in 2025 with morling.dev; let's see what's in stock this year :) year total_score rank days_mentioned 2025 903 369 8 2024 6…

It's a non-issue with GraalVM native binaries. See https://news.ycombinator.com/item?id=46445989 for an example: this CLI tools starts in ms, fast enough you can launch it during t…

Assuming JVM installation is not required (to which I agree, it shouldn't be), why would you care which language a CLI tool is written in? I mean, do you even know whether a given …

As a practical example for a Java-based CLI tool in the wild, here's kcctl, a command line client for Kafka Connect: https://github.com/kcctl/kcctl/ . It's a native binary (via Gra…

Can you back up your claim the post is written by AI?

To me it fundamentally does not make sense to publish texts generated by an LLM. These tools are available to everyone, so readers can just use the LLM directly. When I'm writing a…

This approach can work for experienced speakers, in particular if you have spoken about the given topic before, but I'd strongly advise against not rehearsing for folks a bit newer…

Yepp, making exactly that same point in the post: > This is why we have indexes in databases, which, if you squint a little, are just another kind of materialized view, at least in…

Thank you so much! Very glad to hear the post resonated with you.

"Idempotency key" is a widely accepted term [1] for this concept; arguably, you could call it "Deduplication key" instead, but I think this ship has sailed. [1] https://developer.m…

Exactly that.