HN user

raphaelj

2,169 karma

Portofolio -> https://www.raphaelj.be/

https://github.com/RaphaelJ/

https://datethis.app https://noisycamp.com

Posts37
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news.ycombinator.com 15d ago

Ask HN: Are OSS projects allowing vibe-coding?

raphaelj
1pts1
datethis.app 1y ago

Show HN: Automatically Date Audio from Appliance Noises

raphaelj
6pts4
datethis.app 2y ago

Date Recordings from Background Noises

raphaelj
2pts0
datethis.app 2y ago

Show HN: Date Audio/video Recordings from Background Noises

raphaelj
1pts0
en.wikipedia.org 2y ago

Interlingua

raphaelj
3pts0
myclimatefuture.info 3y ago

How will you experience Climate Change, based on your age and location

raphaelj
2pts0
news.ycombinator.com 3y ago

Ask HN: Should I use WebP and stop providing PNG and JPEG?

raphaelj
7pts9
news.ycombinator.com 3y ago

Ask HN: Mastodon Accounts to Follow

raphaelj
4pts0
www.nytimes.com 3y ago

Artemis 1 launch delayed until September

raphaelj
4pts0
news.ycombinator.com 4y ago

Ask HN: Why Isn't Starlink Built on Solar Powered Drones?

raphaelj
4pts4
news.ycombinator.com 4y ago

Ask HN: Software Engineers and the Gig Economy

raphaelj
3pts0
www.esa.int 4y ago

Three hours to save a space probe

raphaelj
3pts0
news.ycombinator.com 5y ago

Ask HN: What blog platform to use for my SaaS

raphaelj
8pts8
noisycamp.com 5y ago

Show HN: Airbnb for Musicians

raphaelj
14pts5
github.com 6y ago

Show HN: An open-source and decentralized COVID-19 contact-tracing app

raphaelj
3pts1
github.com 6y ago

Show HN: A decentralized and anonymous contact-tracing app

raphaelj
4pts6
science.sciencemag.org 6y ago

86% of all SARS-CoV2 infections might be undocumented

raphaelj
5pts0
news.ycombinator.com 7y ago

Ask HN: Current state of statically typed web framework

raphaelj
7pts8
twitter.com 7y ago

Sorry, upgrading your Dropbox Business plan will take 11 months

raphaelj
174pts83
github.com 9y ago

Show HN: Tool that generates Firebase rules from a schema

raphaelj
1pts0
medium.com 10y ago

Dad. Entrepreneur. (In that order.)

raphaelj
2pts0
news.ycombinator.com 10y ago

Ask HN: Best way to build a backend shared by iOS, Android and the Web?

raphaelj
4pts4
github.com 10y ago

Show HN: Event-driven, user-space and highly-scalable TCP/IP stack

raphaelj
4pts0
github.com 10y ago

Show HN: Event-driven, user-space and highly-scalable TCP/IP stack [pdf]

raphaelj
29pts5
en.wikipedia.org 11y ago

Rail transport in Vatican City

raphaelj
1pts0
github.com 11y ago

Design of a parallel image processing library for non functional programmers

raphaelj
2pts0
www.youtube.com 11y ago

How do they make Silicon Wafers and Computer Chips? (2008)

raphaelj
3pts0
unix.stackexchange.com 11y ago

“I saw his recycling bin (/bin/). I empty it and now I can't open any programs”

raphaelj
17pts5
www.sqlite.org 11y ago

Internal Versus External BLOBs in SQLite

raphaelj
96pts51
arstechnica.com 11y ago

The audacious rescue plan that might have saved space shuttle Columbia

raphaelj
69pts43

Well most of the increase in prices goes into petroleum companies' profits (at least the ones that can export). So it's technically not lost and will be invested somehow.

Like a Carbon tax, the money doesn't disappear. But to whom it gets distributed, that's another story...

You have to register to the utility, but that's just a form to fill with the model and power of the kit.

With a e-meter, you will get compensated when you're generating a surplus (+/- €0.04/kWh last time I checked).

However, thanks to the battery, I'm self-consuming almost all that electricity, saving around €0.30/kWh.

Expect 800kWh of annual production per 1kW of panels.

We legalized these in Belgium last year.

I bought a 1600Wc + 1.9KWh kit (Ecoflow Stream) for +/- 1300€ last summer. It took us about 2h to install (we had to setup a new plug outside), and I already saved 200€+ since July. I am expecting to save about 350€ per year.

Also, as u/jstch said, it's extremely fun to setup and generate your own power!

A 10c€/kWh CfD is not strictly speaking a subsidy, at the government will recover the average market price.

That being said, the total cost per kWh could well reach 20c/kWh, which is ridiculous. It's not only not competitive against renewables, but also not competitive with natural gas (CCGT are probably around 10-15c€/kWh).

Same experience here.

On some tasks like build scripts, infra and CI stuff, I am getting a significant speedup. Maybe I am 2x faster on these tasks, when measured from start to PR.

I am working on a HPC project[1] that requires more careful architectural thinking. Trying to let the LLM do the whole task most often fail, or produce low quality code (even with top models like Opus 4.5).

What works well though is "assisted" coding. I am usually writing the interface code (e.g. headers in C++) with some help from the agent, and then let the LLM do the actual implementation of these functions/methods. Then I do final adjustments. Writing a good AGENTS.md helps a lot. I might be 30% faster on these tasks.

It seems to match what I see from the PRs I am reviewing: we are getting these slightly more often than before.

---

[1] https://github.com/finos/opengris-scaler

Why does he need to manually do the tracing or reference counting of all these nodes?

Instead, he could just use the references he needs in the new tree, delete/override the old tree's root node, and expect the Javascript GC to discard all the nodes that are now referenced.

I've been trying to use other LLM providers than OpenAI over the past few weeks: Claude, Deepseek, Mistral, local Ollama ...

While Mistral might not have the best LLM performances, their UX is IMO the best, or at least a tie with OpenAI's:

- I never had any UI bug, while these were common with Claude or OpenAI (e.g. a discussion disappearing, LLM crashing mid-answer, long context errors on Claude ...);

- They support most of the features I liked from OpenAI, such as libraries and projects;

- Their app is by far the fastest, thanks to their fast reply feature;

- They allow you to disable web-search.

Couldn't the battery just do, as an example, 1 minute long charge then discharge cycles?

For example, if the electricity price is -28€/MWh (like today in Germany), and your battery efficacy is 80%, you could get paid 28€/MWh charging, then only pay back 22€ discharging, generating a 6€/MWh profit.

There might not even be any need for V2G or V2H.

Just charging your car when the demand is low is probably enough to drastically reduce the overall cost of the system. And this has basically no impact on the battery lifespan.

I've an EcoFlow plug & play inverter, and it automatically shuts off if the grid comes down. That's a requirement for all these devices.

Do we know which changes made DeepSeek V3 so much faster and better at training than other models? DeepSeek R1's performances seem to be highly related to V3 being a very good model to start with.

I went through the paper and I understood they made these improvements compared to "regular" MoE models:

1. Latent Multi-head Attention. If I understand correctly, they were able to do some caching on the attention computation. This one is still a little bit confusing to me;

2. New MoE architecture with one shared expert and a large number of small routed experts (256 total, but 8 in use in the same token inference). This was already used in DeepSeek v2;

3. Better load balancing of the training of experts. During training, they add bias or "bonus" value to experts that are less used, to make them more likely to be selected in the future training steps;

4. They added a few smaller transformer layers to predict not only the first next token, but a few additional tokens. Their training error/loss function then uses all these predicted tokens as input, not only the first one. This is supposed to improve the transformer capabilities in predicting sequences of tokens;

5. They are using FP8 instead of FP16 when it does not impact accuracy.

It's not clear to me which changes are the most important, but my guess would be that 4) is a critical improvement.

1), 2), 3) and 5) could explain why their model trains faster by some small factor (+/- 2x), but neither the 10x advertised boost nor how is performs greatly better than models with way more activated parameters (e.g. llama 3).

Do we know which change(s) made DeepSeek V3 so much more efficient than other models?

I went through the paper and I understood they made these improvements compared to "regular" MoE models:

1. Latent Multi-head Attention. If I understand correctly, they were able to do some caching on the attention computation. This one is still a little bit confusing to me;

2. new MoE architecture with one shared expert and a large number of small routed experts (256 total, but 8 in use in the same token inference). This was already used in DeepSeek v2;

3. Better load balancing of the training of experts. During training, they add bias or "bonus" value to experts that are less used to make them more likely to be selected in the future training steps;

4. They added a few smaller transformer layers to predict not only the first next token, but a few additional tokens. Their training error/loss function then uses all these predicted tokens, not only the first one. This is supposed to improve the transformer capabilities of predicting sequences of tokens. Note that they don't use this for inference, except for some latency optimisation by doing speculative execution on the 2nd token.

5. They are using FP8 instead of FP16 when it does not impact accuracy.

My guess would be that 4) is the most impactful improvement. 1), 2), 3) and 5) could explain why their model train faster, but not how is performs greatly better than models with way more activated parameters (e.g. llama 3).

Codestral Mamba 2 years ago

I've been using it for a few months (with Starcoder 2 for code, and GPT-4o for chat). I find the code completion actually better than Github Copilot.

My main complain is that the chat sometimes fails to correctly render some GPT-4o output (e.g. LaTeX expressions), but it's mostly fixed with a custom system prompt. It also significantly reduces the battery life of my Macbook M1, but that's expected.