Hacker News: crcastle

The Figure-Eight Model for Agentic DevEx

crcastle — Tue, 05 May 2026 20:17:29 +0000

Article URL: https://medium.com/@codefinger/the-figure-eight-model-for-agentic-devex-c76894b12de5

Comments URL: https://news.ycombinator.com/item?id=48027911

Points: 3

# Comments: 0

Bloom filters: the niche trick behind a 16× faster API

crcastle — Thu, 23 Apr 2026 04:55:50 +0000

Article URL: https://incident.io/blog/bloom-filters

Comments URL: https://news.ycombinator.com/item?id=47872381

Points: 2

# Comments: 1

Dear Heroku: Uhh What's Going On?

crcastle — Tue, 07 Apr 2026 01:42:40 +0000

Article URL: https://judoscale.com/blog/heroku-whats-going-on

Comments URL: https://news.ycombinator.com/item?id=47669749

Points: 108

# Comments: 45

New comment by crcastle in "AWS engineer reports PostgreSQL perf halved by Linux 7.0, fix may not be easy"

crcastle — Sun, 05 Apr 2026 03:29:18 +0000

Not historically.

New comment by crcastle in "AWS engineer reports PostgreSQL perf halved by Linux 7.0, fix may not be easy"

crcastle — Sun, 05 Apr 2026 02:45:33 +0000

Ubuntu is used in many serious backend environments. Heroku runs tens of thousands (if not more) instances of Ubuntu on its fleet. Or at least it did through the teens and early 2020s.

https://devcenter.heroku.com/articles/stack

AWS engineer reports PostgreSQL perf halved by Linux 7.0, fix may not be easy

crcastle — Sun, 05 Apr 2026 00:13:55 +0000

https://lore.kernel.org/lkml/yr3inlzesdb45n6i6lpbimwr7b25kqk...

Comments URL: https://news.ycombinator.com/item?id=47644864

Points: 410

# Comments: 165

New comment by crcastle in "Building a Firewall via Endpoint Security?"

crcastle — Sat, 28 Mar 2026 02:20:25 +0000

Full post title is Building a Firewall ...via Endpoint Security!? Reverse Engineering macOS 26.4's Undocumented Network Events

The second sentence may be more useful as the title here.

New comment by crcastle in "Future Shock"

crcastle — Thu, 05 Mar 2026 23:52:06 +0000

This is one of the more level-headed and empathetic writings that I've seen on the impact of LLMs on software engineers and our (or at least my) current strange combination of unbridled enthusiasm with existential dread. And it finishes with actual practical advice. (the post was derived from a talk the writer gave at his company)

> there’s fear in the air. You’ve heard that if you don’t learn these tools, you’ll be unemployable. That sounds pretty awful to me. What if none of us have jobs at the end of this?

> The industrial revolution didn’t eliminate human labor. It changed what human labor meant. Human labor still mattered at the end of it. The people who adapt to major technological shifts don’t just survive—they become more valuable, not less.

> I’m here to tell you it’ll be okay. You are smart. You can adapt. I believe in you.

> It’s not about 20x the number of lines of code you write, though you can do that. It’s about doing things you wouldn’t have attempted at all.

> A refactoring you’d never have had time for.

> An analysis you’d never have bothered with.

> A prototype you’d never have built.

> I’ve been doing this for nearly thirty-five years, and this is the most exciting time to write software I’ve seen. Yes, there are pleasures lost here. I love the flow state of writing code, just like I love printing black and white photographs in the darkroom. I don’t have to lose either one. I can still do both for pleasure. Black and white photography isn’t part of anybody’s journalism workflow any more, but people still do it. There’s a place for it all.

> The tools make it easy to produce a lot of code fast. They do not make it safe to skip evaluating what it did. Nobody is exempt. Don’t make our security team have to file disclosure reports, or clean up our messes.

> Two facts:

> We are responsible for what we ship.

> We can’t skip evaluating the work.