Hacker News: maxmcd

New comment by maxmcd in "RX – a new random-access JSON alternative"

maxmcd — Thu, 19 Mar 2026 07:00:43 +0000

Those care about quickly sending compact messages over the network, but most of them do not create a sparse in-memory representation that you can read on the fly. Especially in javascript.

This lib keeps the compact representation at runtime and lets you read it without putting all the entities on the heap.

Cool!

New comment by maxmcd in "Deep dive into Turso, the “SQLite rewrite in Rust”"

maxmcd — Thu, 29 Jan 2026 16:50:28 +0000

They're implementing MVCC

New comment by maxmcd in "JuiceFS is a distributed POSIX file system built on top of Redis and S3"

maxmcd — Thu, 15 Jan 2026 20:50:18 +0000

does having to maintain the slatedb as a consistent singleton (even with write fencing) make this as operationally tricky as a third party db?

New comment by maxmcd in "X-Clacks-Overhead"

maxmcd — Sat, 03 Jan 2026 18:50:55 +0000

Is this possibly an intentional reference to GNU Linux, or unrelated?

New comment by maxmcd in "A super fast website using Cloudflare workers"

maxmcd — Wed, 31 Dec 2025 15:52:14 +0000

TCP performance gets quite poor over long distances. CDNs are very helpful if you're trying to make your site work well far away from your servers.

New comment by maxmcd in "Netflix Open Content"

maxmcd — Tue, 30 Dec 2025 15:45:54 +0000

Quite surprising. It does seem like you can get an https download with

    aws s3 cp --no-sign-request s3://download.opencontent.netflix.com/sparks/creative-commons-attribution-4-intl-public-license.txt .

Which is hitting the bucket path route at: https://s3.amazonaws.com/download.opencontent.netflix.com/sp...

"aws s3 ls" similarly requests: https://s3.amazonaws.com/download.opencontent.netflix.com?li...

New comment by maxmcd in "Biscuit is a specialized PostgreSQL index for fast pattern matching LIKE queries"

maxmcd — Sat, 20 Dec 2025 20:36:47 +0000

I found some more info here: https://biscuit.readthedocs.io/en/latest/benchmark_roaring.h...

New comment by maxmcd in "How to think about durable execution"

maxmcd — Fri, 19 Dec 2025 15:24:11 +0000

I think a lot of the original temporal/cadence authors were motivated by working on event-driven systems with retries. They exhibited complex failure scenarios that they could not reasonably account for without slapping on more supervisor systems. Durable executions allow you to have a consistent viewpoint to think about failures.

I agree determinism/idempotency and the complexities of these systems are a tough pill to swallow. Certainly need to be suited to the task.

New comment by maxmcd in "How to think about durable execution"

maxmcd — Fri, 19 Dec 2025 15:15:13 +0000

Great article for demystifying durable execution: https://lucumr.pocoo.org/2025/11/3/absurd-workflows/

New comment by maxmcd in "GotaTun – Mullvad's WireGuard Implementation in Rust"

maxmcd — Fri, 19 Dec 2025 12:49:30 +0000

I believe you are making use of gVisor’s userspace TCP implementation. I’m not sure if there is something similar in Rust that would be so easy to set up like this.

New comment by maxmcd in "Show HN: Gemini Pro 3 imagines the HN front page 10 years from now"

maxmcd — Tue, 09 Dec 2025 18:30:54 +0000

"Reply in the tone of Wikipedia" has worked pretty well for me

New comment by maxmcd in "Jepsen: NATS 2.12.1"

maxmcd — Mon, 08 Dec 2025 20:20:30 +0000

> > You can force an fsync after each messsage [sic] with always, this will slow down the throughput to a few hundred msg/s.

Is the performance warning in the NATS possible to improve on? Couldn't you still run fsync on an interval and queue up a certain number of writes to be flushed at once? I could imagine latency suffering, but batches throughput could be preserved to some extent?

New comment by maxmcd in "Flow: Actor-based language for C++, used by FoundationDB"

maxmcd — Mon, 08 Dec 2025 18:16:27 +0000

Maybe this? https://forums.foundationdb.org/t/swift-or-c-20-coroutine-wh...

New comment by maxmcd in "100k TPS over a billion rows: the unreasonable effectiveness of SQLite"

maxmcd — Thu, 04 Dec 2025 12:31:40 +0000

Oh nice, yes I think your threads should be able to perform reads concurrently when the write lock is not held. Would make sure you are in WAL mode as well, since I think that will improve your concurrency.

New comment by maxmcd in "100k TPS over a billion rows: the unreasonable effectiveness of SQLite"

maxmcd — Tue, 02 Dec 2025 19:25:58 +0000

This will block threads while waiting for other threads to write. That might work great for your threading model but I usually end up putting the writer in one thread and then other threads send writes to the writer thread.

New comment by maxmcd in "How/why to sweep async tasks under a Postgres table"

maxmcd — Fri, 21 Nov 2025 20:09:44 +0000

Just that row should be locked since it's: "for update skip locked".

I agree the concurrency limitation is kind of rough, but it's kind of elegant because you don't have to implement some kind of timeout/retry thing. You're certainly still exposed to the possibility of double-sending, so yes, probably much nicer to update the row to "processing" and re-process those rows on a timeout.

New comment by maxmcd in "This week in 1988, Robert Morris unleashed his eponymous worm"

maxmcd — Tue, 04 Nov 2025 21:22:07 +0000

I went here next: https://www.youtube.com/@CMUDatabaseGroup

New comment by maxmcd in "A sharded DuckDB on 63 nodes runs 1T row aggregation challenge in 5 sec"

maxmcd — Fri, 24 Oct 2025 13:42:58 +0000

Are there any open sourced sharded query planners like this? Something that can aggregate queries across many duckdb/sqlite dbs?

New comment by maxmcd in "Linus Learns Analog Circuits"

maxmcd — Sun, 28 Sep 2025 23:32:47 +0000

There are a few different styles: https://github.com/orgs/community/discussions/16925

New comment by maxmcd in "Spiral"

maxmcd — Thu, 11 Sep 2025 17:06:21 +0000

Do they mention transactions anywhere? Maybe it will be OLAP?