Hacker News: grep_it

New comment by grep_it in "Creepy Crawlies"

grep_it — Sun, 30 Aug 2026 16:46:59 +0000

Did you read the article?

“[…]because we can generate 1.2 METRIC BAJILLION valid URLs just for a single fork of linux.git.”

New comment by grep_it in "Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache"

grep_it — Fri, 28 Aug 2026 16:45:48 +0000

Sibling comment touched on it, and I guess rust does offer just that, but void casting and doing explicit offset checks for a field is one reason. You can kind of think of it like a tuple in that way and a db engine might use a similar technique.

New comment by grep_it in "Don't use musl if you care about performance"

grep_it — Fri, 28 Aug 2026 16:23:29 +0000

I think the size of linked binaries and simplicity were always the main features?

New comment by grep_it in "Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache"

grep_it — Fri, 28 Aug 2026 04:21:37 +0000

This reminds me how you can save a bunch of bytes just by making sure your structs are aligned. In go for example:

  type Wasteful struct {
    a int16
    b int
    c byte
  }

  type Aligned struct {
    b int
    a int16
    c byte
  }

Will have sizes of 24bytes and 16bytes (on a 64bit system). Same data 8bytes more. If you are storing millions of those objects, then it adds up.

New comment by grep_it in "Elevators"

grep_it — Fri, 31 Jul 2026 16:10:10 +0000

I always come back to this game whenever I'm at a hotel for a conference waiting for the elevator.

Paxos Made Simple (2001) [pdf]

grep_it — Thu, 09 Jul 2026 18:51:22 +0000

Article URL: https://lamport.azurewebsites.net/pubs/paxos-simple.pdf

Comments URL: https://news.ycombinator.com/item?id=48850688

Points: 65

# Comments: 7

New comment by grep_it in "Open Source Low Tech"

grep_it — Tue, 30 Jun 2026 19:49:43 +0000

Awesome resource, thanks for sharing!

Open Source Low Tech

grep_it — Fri, 26 Jun 2026 06:35:17 +0000

Article URL: https://opensourcelowtech.org/

Comments URL: https://news.ycombinator.com/item?id=48683098

Points: 675

# Comments: 140

New comment by grep_it in "Do you even need a database?"

grep_it — Wed, 15 Apr 2026 14:43:05 +0000

Except that eventually you'll find you lose a write when things go down because the page cache is write behind. So you start issuing fsync calls. Then one day you'll find yourself with a WAL and buffer pool wondering why you didn't just start with sqlite instead.

The Architecture of Open Source Applications (Volume 1) Berkeley DB

grep_it — Mon, 02 Feb 2026 20:37:41 +0000

Article URL: https://aosabook.org/en/v1/bdb.html

Comments URL: https://news.ycombinator.com/item?id=46861158

Points: 89

# Comments: 12

New comment by grep_it in "Who are the companies that still use Perl in their back end?"

grep_it — Fri, 09 Jan 2026 03:23:26 +0000

Last I heard, DuckDuckGo backend was Perl.

Load Balancing (2023)

grep_it — Thu, 08 Jan 2026 13:42:28 +0000

Article URL: https://samwho.dev/load-balancing

Comments URL: https://news.ycombinator.com/item?id=46540850

Points: 5

# Comments: 0

Clock synchronization is a nightmare

grep_it — Tue, 23 Dec 2025 18:59:45 +0000

Article URL: https://arpitbhayani.me/blogs/clock-sync-nightmare/

Comments URL: https://news.ycombinator.com/item?id=46368177

Points: 232

# Comments: 159

New comment by grep_it in "Ask HN: Scheduling stateful nodes when MMAP makes memory accounting a lie"

grep_it — Tue, 25 Nov 2025 04:29:26 +0000

Relevant: https://db.cs.cmu.edu/papers/2022/cidr2022-p13-crotty.pdf

SO-YOU-DONT-HAVE-TO INCORPORATED'); DROP TABLE companies; --

grep_it — Sat, 22 Nov 2025 22:48:17 +0000

Article URL: https://sydht.ai/

Comments URL: https://news.ycombinator.com/item?id=46019031

Points: 3

# Comments: 0

New comment by grep_it in "Why do we need dithering?"

grep_it — Fri, 14 Nov 2025 02:09:58 +0000

I love the authors style!

PGM Format Specification

grep_it — Thu, 13 Nov 2025 02:16:01 +0000

Article URL: https://netpbm.sourceforge.net/doc/pgm.html

Comments URL: https://news.ycombinator.com/item?id=45909654

Points: 2

# Comments: 0

New comment by grep_it in "Grayskull: A tiny computer vision library in C for embedded systems, etc."

grep_it — Wed, 05 Nov 2025 18:47:55 +0000

Computer Vision: Algorithms and Applications 2nd Edition is free to download for personal use at https://szeliski.org/Book/

New comment by grep_it in "By the Power of Grayscale"

grep_it — Tue, 04 Nov 2025 23:02:24 +0000

Really enjoyed this article, thanks for sharing!

I had recently learned about using image pyramids[1] in conjunction with template matching algorithms like SAD to do simple and efficient object recognition, it was quite fun.

1: https://en.wikipedia.org/wiki/Pyramid_%28image_processing%29

Modulo Bias

grep_it — Mon, 27 Oct 2025 19:16:51 +0000

Article URL: https://irreal.org/blog/?p=10812

Comments URL: https://news.ycombinator.com/item?id=45725140

Points: 1

# Comments: 0