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watmough

2,259 karma · joined December 30, 2007

Significant current experience including:

* Application architecture, * Seismic loading and processing, * Cross-platform full stack applications C++, Qt5, * NVIDIA CUDA, * Application sand-boxing with Docker on Linux, * Build tooling including Python3, CMake.

Past experience

* Microsoft C++ and MFC application architecture and implementation, * Microsoft .NET stack, * iOS and macOS application programming, * 7 years of experience supporting IHS Kingdom.

Additional Interests

* Programming language development, * Functional programming.

You can reach me at jonathan.watmough@gmail.com

submissionscomments
watmough··on Why your next home computer should be an old Xeon workstation (2019)
As much as love Z620's in particular, my experience of a used one wasn't that great. In particular, watch for v1.0/v2.0 motherboard versions that prevent you from using the faster Xeons, and in general, the model seems to suffer from power supply problems. Just as I got my dual-processor 64Gig Z620 working under macOS, the 2nd processor daughterboard quit. Similar experience on my work Z620 at the time. Exact same failure. Better just to reset and build the fastest thing you can afford. My fast box runs a Ryzen 9 5900x and is 4x faster than my 2019 Razer Blade 15" for building the software I work on.
watmough··on Ask HN: Any certification that is worth it? Legitimately helped your career?
Can recommend!

The rats dig it.

watmough··on How Imagen Works
The important part seems to be the diffusion model.

Explanation linked from same page: https://www.assemblyai.com/blog/diffusion-models-for-machine...

watmough··on macOS Ventura System Settings is bad
Surely people have been wrestling with the 'extensive' iPhone settings for years, and similarly struggling to find things hidden, misnamed or just tucked away in dark corners.

I let my iPhone sleep the display too quickly for ages, before I finally went digging for some option to fix it.

I guess it's clear where Apple are going with macOS, but we don't have to like it.

watmough··on Researchers discover way to 3D print directly inside the body without surgery
Yes, there's been lots of research for many years on this.

https://www.google.com/search?channel=fs&client=ubuntu&q=ult...

And if you want a real tangible example of cavitation, albeit via microwaves rather than focussed ultrasound, take a look at any plastic food containers that you microwave regularly. You'll likely be able to see food that has been 'jetted' into the plastic.

watmough··on Apple Unveils M2
Maybe consider a ThinkPad P1 Gen 4.

$$$ but can be had for 40% off.

A good spec with the nice screen and discrete graphics is < $3k.

Upsides: Great for Ubuntu, everything just works. Screen is beautiful. Keyboard is brilliant.

Downsides: Can get hot. Battery life sucks. Still 11th gen - Tiger Lake.

watmough··on Apple Unveils M2
Asahi Linux is running well enough to be usable for lots of things.

However, no screen brightness control, no sound or YouTube currently. And there's some page size weirdness that means Chrome/Electron (?) is not usable, so no VS Code.

If you can live with that, it's so nice having Linux on the M1 hardware.

watmough··on Vectorized and performance-portable Quicksort
Agner Fog's VCL library is extremely approachable. Just download it and get stuck in.

  Manual
  https://www.agner.org/optimize/vcl_manual.pdf

  GitHub
  https://github.com/vectorclass/version2
Even for trivial stuff like linebreaking input files, massive speedups are there for the taking.
watmough··on Vectorized and performance-portable Quicksort
Tiger Lake https://ark.intel.com/content/www/us/en/ark/products/213803/...

Sniff, already superceded by Alder Lake.

watmough··on Ask HN: What should have been the term for RAII?
I think scope or similar is good.

Also, see related video here

  CppCon 2015: Andrei Alexandrescu “Declarative Control Flow"
  https://youtu.be/WjTrfoiB0MQ?t=1046
watmough··on My Mega65 has arrived
Enjoy ... https://obsolescence.wixsite.com/obsolescence/pidp-11

The 8 and 11 have been made. There was a PiDP-10 in progress, but not sure what the status is on it currently.

watmough··on Ask HN: Docker vs simple DLLs?
I'm maybe a bit of an edge-case here, but I use Docker to provide a CentOS 7 compatible development and run-time environment for a CUDA-based visualization app. There are several benefits to this:

  * The Dockerfile describes my development environment,
  * I can replicate this environment just by setting up Docker and copying a few files,
  * I can run my development/run-time environment on *fast* AMD Ryzen 9 hardware that  causes a real CentOS 7 kernel to panic at boot.
For me, in practical terms, I can do a build in 6 minutes versus 25, when compared with my work laptop (2019 Razer Blade 15)
watmough··on Success determined by ability to speak, ability to write, and quality of ideas
I'm happy to believe that the article captures part of success.

However, communication is a two-way process, and the following have been important to me in my career journey:

  * Understanding when to listen instead of talking,
  * Asking open-ended questions that provide opportunity for other viewpoints,
  * Empathizing with others', including understanding their expectations.
I guess the older I've gotten, the more value i've gained from just listening.
watmough··on Removing characters from strings faster with AVX-512
This is really cool.

I just got through doing some work with vectorization.

On the simplest workload I have, splitting a 3 MByte text file into lines, writing a pointer to each string to an array, GCC will not vectorize the naive loop, though ICC might I guess.

With simple vectorization to AVX512 (64 unsigned chars in a vector), finding all the line breaks goes from 1.3 msec to 0.1 msec, so a little better than a 10x speedup, still just on the one core, which keeps things simple.

I was using Agner Fog's VCL 2, Apache licensed C++ Vector Class Library. It's super easy.

watmough··on Tutorial Series to learn Common Lisp quickly
Great point!

Maybe not so much of a fallacy when you look at how developer management currently works in most mainstream companies.

It really does seem more geared to going slowly, and making each tiny step be recorded in some system.

watmough··on Tutorial Series to learn Common Lisp quickly
Yes, it's great to experience the 10x or 100x developer syndrome sometimes.

Using Clojure changed my life somewhat, as at some point I rewrote 2000 lines of C++ (to handle splitting and coalescing NAESB cycle pipeline nominations) in about 27 lines of pattern-matching Clojure, and just no one, no one would take it seriously. A usable UI in Swing to manage it wasn't much more, and was cross-platform. Not a fun experience overall, I ended up quitting that company, doing iPhone dev for a bit, then moved back into G&G.

Other than that rewrite experience, I just used Clojure like I used to use Perl. Easy to bang something out in, and performant native Java libraries for things you might not expect, like low-level SQL Server (2005 at the time!) and Oracle (8 at the time) drivers.

I'm back mainly as a C++ developer now in visualization and HPC.

watmough··on Ask HN: MacBooks seems to be the only viable option these days
The Core 2 Duo 17" MacBookPro is the most expensive and worst machine I ever owned.

The 13" MBP M1 has been the best, apart from the wretched touchbar.

watmough··on Ask HN: MacBooks seems to be the only viable option these days
I'm on Ubuntu 20.04 on a crisp new Lenovo P1. Expensive but very nice laptop. The powerbrick did self-destruct, but I bought the fancy service plan and support shipped me a replacement after just a few questions with no issues.

I would echo your experience. macOS has gone significantly downhill overall, in terms of sheer ugliness and hassle to use as a developer box. I'm think about the continual prompts for running software and allowing access to folders etc., incredible difficulty in getting non-macOS frameworks like SDL etc., to run.

It's no longer worth the hassle.

My work Razer Blade 15 runs CentOS 7. My MBP M1 runs Asahi. And this Lenovo is running Ubuntu 20.04. Gnome on all of them, and by and large, much much better experience than either current Windows or macOS.

watmough··on What happens in your dog’s brain when you speak
In all honesty I just speak full sentences to my dog. Sure, she doesn't understand it all, but she knows my daughters' nicknames, mommy, cat, pigs ear, bed, upstairs.

Pretty good vocabulary really.

watmough··on Ask HN: Beating depression with or without anti-depressants?
Go talk to a doctor they see this stuff everyday.

Seriously, there's lots of treatments. Lots of different side-effects. Between you, you'll experiment until you find something that works, and you may manage to be in a much better place than you were.

Right now, you really have no idea if you have depression or severe anxiety.

This isn't like cancer. You won't be dead in 5 years. Go get treatment, and keep your life and your job.

watmough··on Crime scene investigators learn to dowse for the dead
At a house we owned where the well had run dry, we hired the guy who ran the local water treatment plant to come and dig us a new well. Sure enough, came out, dowsed, and duly a backhoe dug down about 10 foot, and we had our new well.

This is in N.E. Scotland, back in about 1991. The funny thing was that my dad was a total skeptic on this, and such other 'discredited' things as spoon-bending, and even he had to admit the guy had some not easily explainable talent.

watmough··on Phantom OS
Back in late '80's out of St Andrews and Glasgow, there was a bunch of research into persistent object environments. Here's a paper:

https://archive.cs.st-andrews.ac.uk/papers/download/MBC+88.p...

In short imagine Java or C++ objects, but they can live in a soup in a persistent database.

Imagine if your programming assignments at school, were "open this database then write a client to talk to the object retrieved." That's what we actually had in PS-Algol in 86. Super cool!

watmough··on Ask HN: Starting a Career in Programming at 61?
I wasn't planning on posting, lots of great answers already in the thread, but has he considered learning Oracle DB administration, the various admin tools, and PL/SQL programming.

There is a lot of work out there managing Oracle installs, populating databases, and all the other duties associated with running Oracle instances.

There's plenty of scope for programming, and the work should be more regular hours and less stressful on the whole than an entry-level programming job.

Additionally, it should be reasonably easy to break into the field via the various certifications, and the tools and DB itself are accessible for self-directed learning.

watmough··on Asahi Linux alpha release
Awesome!! Posting from it now after about 2 hours or so to backup some stuff and run through the installer with a couple glasses wine.

Super slick. No issues.

watmough··on Show HN: Supernotes 2 – a fast, Markdown notes app for journalling and sharing
Well snap. I was thinking about dipping my toe in this space.

If anyone wants to give me $6 Million, with 100% return in the event of my death, I'm all ears.

watmough··on Ask HN: Why is MS Teams so slow, do devs test Teams on less powerful machines?
Interesting! I get this on the Teams Preview for Linux (CentOS 7) all the time. It is infuriating.

Other than that, I sometimes need to reboot to pick up my Logitech webcam correctly, when working at home.

Otherwise, it really seems pretty decent. This is on a 2019 Razer Blade 15" with 40 GB dram.

watmough··on Anyone else feel the constant urge to leave the field and become a plumber?
No way.

Loving my current position(s) way too much.

But also, if I did leave the field with some cash, I’d probably go be a backwoods flight instructor.

watmough··on Ask HN: How to make an extra $50k+ per year without changing jobs?
Ordered.

My kids will love it.

watmough··on Words known better by males than females, and vice versa
Yves Delorme make some lovely Jacquard bath sheets.

If you don't blanche at spending $100+ on a single towel. ;)

watmough··on Last Windows 11 update changed all default browser settings to Edge
Similar, after a crash, I reinstalled Windows, but using my Azure work account and a PIN to login. However, the feeling of not 'owning' this machine anymore just became too irritating.

After that I installed CentOS 7 on machines I use for work development, including a desktop, and my Razer Blade 15. Our products are RHEL / Windows, and most everything I care about can be made to work pretty well on CentOS 7, including Teams, VS Code, CUDA, Python etc. A few things, including cmake work a heckuva lot faster in fact.

Other machines I have mostly run MacOS (anxiously awaiting Ashai Linux!) or Elementary OS, which is pretty awesome.

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