Hacker News: mgaunard

New comment by mgaunard in "Mathematicians still don't know the fastest way to multiply numbers"

mgaunard — Sun, 19 Jul 2026 04:43:41 +0000

You're missing the fact that "multiplying a digit with a number" is not a single operation.

New comment by mgaunard in "Lessons from the Vasa Shipwreck"

mgaunard — Sun, 12 Jul 2026 17:03:09 +0000

I feel like people use this "remember the Vasa" idea every 6 months.

Yes, we all remember the Vasa, and understand how it applies to any untested overengineered idea.

New comment by mgaunard in "Decoding the obfuscated bash script on a Uniqlo t-shirt"

mgaunard — Wed, 08 Jul 2026 14:32:21 +0000

how is it obfuscated? It's literally written as plain black monospace text on a white background.

Pretty sure any AI can solve it in 20 seconds.

New comment by mgaunard in "A better way to tie gym shorts (or any drawstring) [video]"

mgaunard — Tue, 07 Jul 2026 19:40:05 +0000

99% of all loose ties are due to people doing a granny knot instead of a square knot.

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Tue, 07 Jul 2026 15:52:31 +0000

There is no shared lineage here. Some of the people who worked on sender/receivers indeed also worked at Nvidia on Thrust, which never had anything to do with coroutines.

New comment by mgaunard in "My AI-built PHP engine in Rust passes 17% of PHP-src tests, renders WordPress"

mgaunard — Sun, 05 Jul 2026 13:24:52 +0000

most of those are just bindings, trivial work.

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Sun, 05 Jul 2026 09:48:54 +0000

An actor does not have a queue; that's again the whole point I already made: it's event-driven, things are decoupled and the actor is not aware of how control flow happens.

Regardless, when the queue which exists and is per-thread is empty, the program terminates.

New comment by mgaunard in "My AI-built PHP engine in Rust passes 17% of PHP-src tests, renders WordPress"

mgaunard — Sun, 05 Jul 2026 01:07:29 +0000

Why is the AI only able to reach 17%?

Surely it can just keep iterating until it implements the full test suite?

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Sun, 05 Jul 2026 00:47:24 +0000

Well in mine for example, threads are pinned to a core and always spin, and actors are pinned to a given thread (you can have an arbitrary number of actors per thread, they're just objects), so "waiting" is certainly not something you'd use to describe the setup in any capacity.

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Sat, 04 Jul 2026 12:56:23 +0000

That sounds like a misunderstanding of how the actor model works. An actor doesn't wait. It's an event-driven system, it doesn't get to own and decide when messages get fed to it.

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Fri, 03 Jul 2026 11:46:54 +0000

not really, they yield to other event sources, which is the opposite of waiting (which blocks forward progress and is a violation of real-time guarantees)

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Fri, 03 Jul 2026 11:19:36 +0000

yield to the event loop

New comment by mgaunard in "FoundationDB's Flow – Bringing Actor-Based Concurrency to C++11"

mgaunard — Fri, 03 Jul 2026 11:16:11 +0000

Coroutines aren't great, even C++26 is explicitly avoiding them for its foundational concurrency model.

In any case a good concurrency library doesn't need more than C++14.

New comment by mgaunard in "A Tiny Compiler for Data-Parallel Kernels"

mgaunard — Sat, 27 Jun 2026 02:03:12 +0000

essentially this is a mini-ISPC?

New comment by mgaunard in "A C++ implementation of a fast hash map and hash set using hopscotch hashing"

mgaunard — Sat, 27 Jun 2026 01:56:05 +0000

boost unordered flat map didn't exist in 2016 (nor 2019).

New comment by mgaunard in "A C++ implementation of a fast hash map and hash set using hopscotch hashing"

mgaunard — Fri, 26 Jun 2026 22:00:11 +0000

How does it compare to boost unordered flat map?

Looks like the benchmarks were last updated in 2019.

New comment by mgaunard in "British Columbia, Time Zones, and Postgres"

mgaunard — Tue, 23 Jun 2026 15:16:46 +0000

You're suggesting pre-filling future data based on extrapolating current rules (up to an arbitratily unknown high date) instead of using a constant.

I don't really see how that is a good approach in any capacity.

New comment by mgaunard in "British Columbia, Time Zones, and Postgres"

mgaunard — Mon, 22 Jun 2026 21:55:06 +0000

Never heard of DST? The authoritative time is constant in the local time zone, but needs to change in UTC twice a year.

This is the exact reason people store time in local time zones.

Also remember the date/time where DST switching occurs is entirely timezone-specific, and it's not necessarily the same pattern every year (as demonstrated with British Columbia).

New comment by mgaunard in "Stop Using JWTs"

mgaunard — Tue, 16 Jun 2026 19:28:27 +0000

A whole lot of nonsense from a web guy.

Please, keep using JWTs, they do their job well: giving you an access or ID token that you can pass between applications and trust based on cryptographic signatures from an identity provider.

New comment by mgaunard in "Ntsc-rs – open-source video emulation of analog TV and VHS artifacts"

mgaunard — Sun, 07 Jun 2026 20:21:55 +0000

Film is 24fps which is lower than PAL.

The 30fps of NTSC is actually associated with "cheap-looking" video.