Hacker News: jmg_

New comment by jmg_ in "Leaving serverless led to performance improvement and a simplified architecture"

jmg_ — Thu, 16 Oct 2025 03:12:53 +0000

> We built chproxy specifically because ClickHouse doesn't like thousands of tiny inserts. It's a Go service that buffers events and sends them in large batches. Each Cloudflare Worker would send individual analytics events to chproxy, which would then aggregate and send them to ClickHouse.

While I understand how this isn't the only thing that needed to be buffered, for Clickhouse data specifically I'd be curious why they built a separate service rather than use asynchronous inserts:

https://clickhouse.com/docs/optimize/asynchronous-inserts

New comment by jmg_ in "Why does target="_blank" have an underscore in front?"

jmg_ — Mon, 24 Feb 2025 15:05:32 +0000

I’m having the same realization regarding Turbo.

Always thought it was a creatively simple solution, but had no idea the pattern had existed (and was used) for so long.

New comment by jmg_ in "Ask HN: What's a good stationary exercise bike with a Bluetooth protocol?"

jmg_ — Tue, 18 Feb 2025 03:30:32 +0000

I'm very happy with my Wahoo Kickr, although it is trainer (BYOBike) rather than exercise bike:

https://www.wahoofitness.com/devices/indoor-cycling/bike-tra...

The trainer connects to their app (and a variety of other apps) over bluetooth.

New comment by jmg_ in "CDC: Unpublished manuscripts mentioning certain topics must be pulled or revised"

jmg_ — Sun, 02 Feb 2025 07:32:46 +0000

Care to comment on how CDC resources for primary care providers have been removed related to contraceptive eligibility?

https://www.cdc.gov/contraception/hcp/provider-tools/index.h...

https://web.archive.org/web/20241219075518/https://www.cdc.g...

https://play.google.com/store/apps/details?id=gov.cdc.ondieh...

https://web.archive.org/web/20241231085620/https://play.goog...

New comment by jmg_ in "Apple and the AI Divide"

jmg_ — Wed, 08 Jan 2025 17:16:59 +0000

For a lot of the ways I see friends and family use Mac products, 256gb is often good enough.

I'd argue for people that care about storage space the default acts as a price anchor.

New comment by jmg_ in "Advent of Code 2024 in pure SQL"

jmg_ — Fri, 03 Jan 2025 00:04:28 +0000

Funnily, I’m actively working on rewriting a stored procedure which parses an XML snippet as one of its arguments

Luckily it’s not a handwritten XML parser though: https://learn.microsoft.com/en-us/sql/t-sql/functions/openxm...

New comment by jmg_ in "Ask HN: What are your most regretted tech purchases?"

jmg_ — Wed, 27 Nov 2024 17:15:19 +0000

FWIW, I'm in a similar situation right now. I was able to massively decrease noise (and air flow) by switching to Noctua NF- A4x10 FLX fans. As long as my workloads aren't sustained temperatures are fine and noise has from gone ~70-80dB to ~40dB, with the power supply fans being the loudest part now.

Upgrade took me an hour and cost $80 via Amazon.

New comment by jmg_ in "PyPy v7.3.16"

jmg_ — Wed, 24 Apr 2024 15:15:35 +0000

Note they're comparing to CPython v3.7 and while https://speed.python.org doesn't go back to 3.7, the improvements between 3.8 to 3.12 are pretty massive.

I don't doubt PyPy is faster than CPython, but it would be very interesting to see latest PyPy compared to latest CPython.

New comment by jmg_ in "A decent VS Code and Ruby on Rails setup"

jmg_ — Thu, 22 Feb 2024 05:03:53 +0000

Mind linking the ERB recommendation? Can’t see the replies without an account.

New comment by jmg_ in "A Deep Dive into RSpec Tests in Ruby on Rails"

jmg_ — Sun, 11 Feb 2024 21:51:57 +0000

While I'm not currently using rspec, rswag/rswag is library for rspec I envy:

https://github.com/rswag/rswag

I'm currently using thoughtbot/json_matchers w/ partials of my OpenAPI spec, but its not nearly as user friendly:

https://github.com/thoughtbot/json_matchers

New comment by jmg_ in "Ask HN: How do you setup a new Mac?"

jmg_ — Sun, 28 Jan 2024 21:24:42 +0000

I maintain a Brewfile (https://github.com/Homebrew/homebrew-bundle) which contains the majority of the non-project specific applications that I like to install on any new Mac:

https://github.com/jonahgeorge/dotfiles/tree/main

What's really nice is the `cask` & `mas` keywords allow you to install .dmg files & directly from the App Store.

---

While its not included in there yet, I've been experimenting with maintaining a private Homebrew tap which contains my ~/bin directory as opposed to shell aliases.

New comment by jmg_ in "Upgrading GitHub.com to MySQL 8.0"

jmg_ — Fri, 08 Dec 2023 16:54:39 +0000

Does anyone know if the performance regressions between 5.7 and 8.0 have been fixed? I no longer use MySQL regularly so I haven't been following this.

If I recall correctly, this was one of the major reasons why people were deferring this upgrade.

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> Most notably, we encountered a problem where queries with large WHERE IN clauses would crash MySQL. We had large WHERE IN queries containing over tens of thousands of values.

The need to rewrite queries is mildly concerning. If this was part of their Rails codebase, I'm curious if these patches will make it into the ORM.

New comment by jmg_ in "Launch HN: PeerDB (YC S23) – Fast, Native ETL/ELT for Postgres"

jmg_ — Thu, 27 Jul 2023 19:38:21 +0000

Calling out limitations like this in the documentation would go a long way in building confidence in the project. Better yet, if there's an example of how to deal with "day-2" operational concerns like this.

Simply looking at the docs on these two pages, its unclear to me whether there's a way to update the mirror definition when a schema change occurs or if I need to drop & recreate the mirror (and what the effects of this are in the destination):

- https://docs.peerdb.io/sql/commands/create-mirror

- https://docs.peerdb.io/usecases/Streaming%20Query%20Replicat...

All-in-all, very excited to see this project and will be watching it closely!

New comment by jmg_ in "Lessons learned from 15 years of SumatraPDF, an open source Windows app (2021)"

jmg_ — Thu, 09 Mar 2023 06:52:13 +0000

Funnily, more than a few Electron apps use SumatraPDF under the hood:

https://github.com/artiebits/pdf-to-printer/blob/master/src/...

New comment by jmg_ in "Why Apple’s iMessage is winning: teens dread the green text bubble"

jmg_ — Sat, 08 Jan 2022 23:31:38 +0000

Unfortunately it seems post-Facebook acquisition they ended support for (at least some of) those platforms.

https://blog.whatsapp.com/whats-app-support-for-mobile-devic...

New comment by jmg_ in "Using Nginx as an Object Storage Gateway"

jmg_ — Fri, 03 Dec 2021 00:18:18 +0000

I've always been curious to see how project owners respond to someone re-implementing portions of paid features in an open source project.

Assuming the patch is valid, do they decline it citing the paid feature or do something like making a straw man argument against it?

New comment by jmg_ in "Eleven Years of Go"

jmg_ — Tue, 10 Nov 2020 23:20:29 +0000

1) Due to covid its highly likely that many of the companies in NY are listing as remote rather than NY-based.

2) Just an opinion, but I would guess the majority of companies on Dice would trend towards older tech stacks. My employer has 4 open Go positions but is not found on Dice.

- Angel.co shows 10 Go-related jobs in NYC

- Linkedin shows 293 Go-related jobs in NYC

New comment by jmg_ in "Alcoa 50k ton forging press"

jmg_ — Mon, 05 Oct 2020 06:24:55 +0000

If you’re interested in this, there’s a great short video about the USAF Heavy Press Program: https://m.youtube.com/watch?v=hpgK51w6uhk

New comment by jmg_ in "Ask HN: Are there any open source alternatives to Alexa, Siri, etc?"

jmg_ — Wed, 02 Aug 2017 09:26:17 +0000

Fwiw CMUSphinx supports wake words in the pocketsphinx project: https://cmusphinx.github.io/wiki/faq/#q-how-to-implement-hot...

New comment by jmg_ in "Show HN: A browser-based IRC client built on Node.js – first Node project"

jmg_ — Fri, 13 Jun 2014 07:33:58 +0000

While not quite finished, there's also Slate (https://github.com/slate/slate) by Holowaychuk