Hacker News: conradludgate

New comment by conradludgate in "Jujutsu megamerges for fun and profit"

conradludgate — Tue, 21 Apr 2026 07:21:39 +0000

I've been doing this in git for years. Interactive rebasing isn't that scary. At work we have a very big stacked PR culture on github using native git

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

conradludgate — Sun, 05 Apr 2026 06:36:06 +0000

It's the performance team's job to test these things. Doesn't mean they're going to deploy it immediately.

Someone should be testing these things and reporting regressions

New comment by conradludgate in "Show HN: I built a DNS resolver from scratch in Rust – no DNS libraries"

conradludgate — Thu, 02 Apr 2026 18:55:07 +0000

What's the reason you're not using hickory? Or was that the LLMs choice? Genuinely curious

New comment by conradludgate in "The way CTRL-C in Postgres CLI cancels queries is incredibly hack-y"

conradludgate — Tue, 24 Mar 2026 07:29:17 +0000

This is new in postgres 18/protocol 3.2. libpq still defaults to protocol 3.0 and many client drivers don't have support for protocol 3.2

New comment by conradludgate in "The future of version control"

conradludgate — Sun, 22 Mar 2026 17:59:03 +0000

My understanding of the way this is presented is that merges don't _block_ the workflow. In git, a merge conflict is a failure to merge, but in this idea a merge conflict is still present but the merge still succeeds. You can commit with conflicts unresolved. This allows you to defer conflict resolution to later. I believe jj does this as well?

Technically you could include conflict markers in your commits but I don't think people like that very much

New comment by conradludgate in "Redox OS has adopted a Certificate of Origin policy and a strict no-LLM policy"

conradludgate — Tue, 10 Mar 2026 14:31:09 +0000

I've never had a one-shot prompt ever work. It's always an interactive session to eventually get to the working solution.

New comment by conradludgate in "RFC 9849. TLS Encrypted Client Hello"

conradludgate — Wed, 04 Mar 2026 11:13:03 +0000

ECH doesn't benefit you if you're connecting directly to one IP. Middleboxes can track that you're connecting to this IP.

ECH prevents tracking through routing layers where your ClientHello might contain foo.example.com or bar.example.com but route via the same IP (Cloudflare). A middlebox can see you are using a cloudflare hosted website, but not know what cloudflare website.

There's no benefit encrypting the SNI with 10.20.30.40 if they can see you're connecting to 10 20.30.40 anyway

New comment by conradludgate in "RFC 9849. TLS Encrypted Client Hello"

conradludgate — Wed, 04 Mar 2026 11:07:26 +0000

The website owner (or cloudflare in this case) has the keys to decrypt the client hello. That's necessary for routing information.

New comment by conradludgate in "Why does C have the best file API"

conradludgate — Mon, 02 Mar 2026 05:28:47 +0000

The point the article makes is that a 32GB file can be mmapped even if you only have 8GB of memory available - it wasn't talking about the address space. So the response is irrelevant even if technically correct

New comment by conradludgate in "Turn Dependabot off"

conradludgate — Fri, 20 Feb 2026 22:14:26 +0000

https://rustsec.org/

New comment by conradludgate in "Rust at Scale: An Added Layer of Security for WhatsApp"

conradludgate — Thu, 29 Jan 2026 05:43:28 +0000

No one I know in the UK seriously uses signal. If I'm asking for a phone number from a neighbour it's going to be WhatsApp

New comment by conradludgate in "How London became the rest of the world’s startup capital"

conradludgate — Wed, 28 Jan 2026 22:52:43 +0000

As long as you live within Greater London and can use TFL, it's more like 5%

New comment by conradludgate in "I built a 2x faster lexer, then discovered I/O was the real bottleneck"

conradludgate — Sun, 25 Jan 2026 14:16:12 +0000

Yes, but it's an O(1) random access seek rather than O(n) scanning seek

New comment by conradludgate in "ADHD drugs don't work the way we thought"

conradludgate — Wed, 31 Dec 2025 09:25:36 +0000

It doesn't make sense to me. I was diagnosed with ADHD at the start of the year. I've had consistently good sleep for several years prior to the diagnosis and I never particularly felt tired

New comment by conradludgate in "High-performance C++ hash table using grouped SIMD metadata scanning"

conradludgate — Mon, 29 Dec 2025 21:41:07 +0000

To elaborate, hashbrown uses quadratic-ish probing over groups, each group can store 16 slots on sse2.

https://github.com/rust-lang/hashbrown/blob/master/src/contr...

https://github.com/rust-lang/hashbrown/blob/6efda58a30fe712a...

New comment by conradludgate in "High-performance C++ hash table using grouped SIMD metadata scanning"

conradludgate — Mon, 29 Dec 2025 21:34:18 +0000

As far as I understand, hashbrown already does this. Hashbrown is based on Google's SwissTable, and this project references that SwissTable already does this optimisation.

New comment by conradludgate in "Pre-commit hooks are broken"

conradludgate — Sat, 27 Dec 2025 09:37:17 +0000

I've worked in several projects where running the tests locally automatically install pre-commit hooks and I've wanted to commit warcrimes because of it.

Don't do that, just dont.

New comment by conradludgate in "Pre-commit hooks are broken"

conradludgate — Sat, 27 Dec 2025 09:33:57 +0000

The downside currently (although I've been assured this will be fixed one day) is that it doesn't support running static analysis over each commit you want to fix.

My git rebase workflow often involves running `git rebase -x "cargo clippy -- --deny=warnings"`. This needs a full checkout to work and not just a single file input

New comment by conradludgate in "The Algebra of Loans in Rust"

conradludgate — Fri, 26 Dec 2025 13:42:50 +0000

Common wisdom is that pinning is a property of the place, not the reference or the type.

A type that might require stable pointers, like async{}, might want to be movable prior to use, so you don't want the type to require the value be pinned immediately. Or if you do, you need a construction like pinned-init that offers `&pin out T` - a pinned place that can be written to on initialisation of the type.

New comment by conradludgate in "Avoid UUID Version 4 Primary Keys in Postgres"

conradludgate — Mon, 15 Dec 2025 17:53:29 +0000

100%. You can use rendezvous hashing to determine the shard(s). The hash of a sequence should be randomly distributed as changing the LSB should propagate to 50% change in the output bits.