Hacker News: Rietty

New comment by Rietty in "Who owns the code Claude Code wrote?"

Rietty — Tue, 28 Apr 2026 12:05:57 +0000

Why were the HFT firms suing employees?

New comment by Rietty in "Fix your tools"

Rietty — Sun, 22 Feb 2026 21:51:50 +0000

And this is why I just love Airflow so much.

New comment by Rietty in "Ask HN: Who here is not working on web apps/server code?"

Rietty — Sun, 21 Dec 2025 16:58:48 +0000

Some of the largest are a few billion rows and we sample randomly when developing code then execute it on all

New comment by Rietty in "Ask HN: Who here is not working on web apps/server code?"

Rietty — Sun, 21 Dec 2025 16:51:45 +0000

Many of my datasets are similiar!

New comment by Rietty in "Ask HN: Who here is not working on web apps/server code?"

Rietty — Sun, 21 Dec 2025 16:51:12 +0000

Depends on the dataset anywhere from seconds to tens of minutes depending on preprocessing needed.

New comment by Rietty in "Ask HN: Who here is not working on web apps/server code?"

Rietty — Fri, 19 Dec 2025 21:52:42 +0000

Working in a Data Engineering/Operations role which focuses heavily on financial datasets. Everything is within AWS and Snowflake and each table can easily have >100M records of any type of random data (there is a lot of breadth.) General day to day is creating jobs that will process large amounts of input data and storing them into Snowflake, sending out tons of automated reports and emails to decision makers as well as gathering more data from the web.

All of this is done in a Python environment with usage of Rust for speeding up critical code/computations. (The rust code is delivered as Python modules.)

The work is interesting and different challenges arise when having to process and compute datasets that are updated with 10s of TBs of fresh data daily.

New comment by Rietty in "High-income job losses are cooling housing demand"

Rietty — Tue, 02 Dec 2025 02:55:29 +0000

According to a friend I know who lives in the tri-state area that is what happens to them, but they max out 401K, have insurance etc.

New comment by Rietty in "x86 architecture 1 byte opcodes"

Rietty — Fri, 31 Oct 2025 20:02:23 +0000

What if the LLM gives them bad information and they don't know it? I personally would also just ask in a thread than risk the LLM info.

New comment by Rietty in "SIMD within a register: How I doubled hash table lookup performance"

Rietty — Mon, 28 Jul 2025 17:29:55 +0000

> Yet the super fast probe with apparently made it not an issue?

Could you explain how that makes it a non-issue? It seems counter-intuitive to me that it solves the problem by just probing faster?

New comment by Rietty in "Why I wrote the BEAM book"

Rietty — Wed, 04 Jun 2025 15:43:09 +0000

> we had a hack to drop all messages in a process's mailbox through the introspection facilities and sometimes we automated that with cron...

What happens to the messages? Do they get processed at a slower rate or on a subsystem that works in the background without having more messages being constantly added? Or do you just nuke them out of orbit and not care? That doesn't seem like a good idea to me since loss of information. Would love to know more about this!

New comment by Rietty in "Boeing Revokes Health Benefits for Striking Workers"

Rietty — Wed, 02 Oct 2024 15:29:53 +0000

Does striking mean you are unemployed, and if so, why? I mean I understand that you're not gonna get paid if you strike.. but feels weird to also have other things affected? Then again I don't know how the US works. (Genuine question)

New comment by Rietty in "Today Microsoft Banned My Country Iran from Minecraft"

Rietty — Thu, 25 Apr 2024 15:26:39 +0000

Minecraft is not an online game, it has a multi-player option sure.. but it doesn't strictly need to be online. There is a single-player mode since basically forever..

New comment by Rietty in "She lived in a New York hotel for more than 40 years, but her life was a mystery"

Rietty — Wed, 15 Nov 2023 16:02:27 +0000

It's one of the wealthier neighbourhoods afaik, so apparently it's pretty nice. I think 'low 80s' means when they started renting there.

New comment by Rietty in "Japanese tea commercial actress created by AI, is it the scandal-free future"

Rietty — Wed, 18 Oct 2023 18:09:43 +0000

I understand the first two, but I could never wrap my head around the "having an SO" is a scandal. Why is that?

New comment by Rietty in "Google is going to court for the first time over alleged pay discrimination"

Rietty — Wed, 11 Oct 2023 22:04:22 +0000

You don't AFAIK. Mine just asked for a routing and account number.

New comment by Rietty in "How would you say “She said goodbye too many times before.” in Latin?"

Rietty — Mon, 11 Sep 2023 12:58:02 +0000

Do you have an example of Ovid's that make Catulus look like an amateur?

New comment by Rietty in "The Fibonacci Matrix"

Rietty — Mon, 31 Jul 2023 16:17:45 +0000

This was a really good post, I have no formal math training and could read it easily.

New comment by Rietty in "Good code is like a love letter to the next developer who will maintain it"

Rietty — Fri, 21 Jul 2023 02:02:50 +0000

Can't you already do that with pre-commit hooks? We use those at work to check a lot of stuff like that before a commit ever goes through.

New comment by Rietty in "Pharo 11"

Rietty — Fri, 12 May 2023 03:51:18 +0000

Could you give a good example of functional programming that does not follow that method? I am very interested.

New comment by Rietty in "NetHack 3.6.7"

Rietty — Fri, 17 Feb 2023 05:22:46 +0000

I would check out Dungeon Crawl: Stone Soup if you like roguelikes. It is similar to Nethack and has both tiles and an ASCII version.