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Posts by Marco Neumann

If you believe conservatives, Germans are allegedly confused about "soy milk" and if it is cow-based or not, but at the same time it's virtually impossible to know if a certain type of cheese is vegetarian or not (not talking about vegan!) without reading the fine print. 🤷

1 month ago 2 0 0 0
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crepererum - Only security updates? An analysis of how often you need to accept breaking changes so you can also consume security updates.

First blog post of the year:

crepererum.net/only-securit...

#Rust #Security #OSS

2 months ago 3 0 0 0

So you need another AI agent to coordinate all your tasks/agents 😉

2 months ago 1 0 2 0

"We" might not have learned anything, but the far right did: they now know that they can get away with it. And that's a problem.

3 months ago 2 0 0 0
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FFC Condemns Sexual Assaults by Israeli Forces - Freedom Flotilla Freedom Flotilla Coalition Condemns Grotesque Sexual Assaults by Israeli Forces Demands Accountability Amid Systemic Culture of Impunity It recently came to light that Israeli police and prison offici...

We condemn grotesque sexual assaults by Israeli forces. We demand accountability amid systemic culture of impunity.
freedomflotilla.org/2026/01/02/f...

3 months ago 132 75 2 6
Screenshot of the Bluesky mobile app showing the following error:

"Hmm, some kind of issue occurred when contacting the feed server. Please let the feed owner know about this issue.

Message from server: Internal Server Error"

Screenshot of the Bluesky mobile app showing the following error: "Hmm, some kind of issue occurred when contacting the feed server. Please let the feed owner know about this issue. Message from server: Internal Server Error"

@spacecowboy17.bsky.social the "pictures for you" is returning an internal server error for me.

Anything I can do to help?

Thanks BTW for the great service! ❤️

5 months ago 4 0 1 0

LocalSet is quite frankly a hack, because tokio's multi thread runtime by design needs Send for efficiency.

Also if the futures exposed by a library (public or internal in a larger project) nearly every user will run into issues if they are not Send.

5 months ago 3 0 1 0

github.com/influxdata/d...

5 months ago 0 0 1 0

There are companies where I'm excited when they are using my open source code.... and then there are companies for which I would rather burn everything down and become a farmer.

5 months ago 0 0 1 0

@tangled.org not sure if that's intended, but both tangled.org/terms and tangled.org/privacy lead to empty pages

6 months ago 2 0 0 0
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Also eine Art "Fidget Toy" für den Mund? 🤔

7 months ago 2 0 0 0

In Hamburg hat die Werbewirtschaft erfolgreich ne riesige Aktion gegen die Initiative gefahren, teilweise mit moralisch fragwürdigen Methoden ("hi, ich bin X von der Tafel. Danke , dass es Außenwerbung gibt, sonst könnte ich meine Arbeit nicht machen").

8 months ago 0 0 0 0

That said, I think your video was good. It shows what you've tried and how you did NOT find a conclusion, something that is super underrepresented. So I think it was good 👍

9 months ago 0 0 0 0
Debunking HDR by Steve Yedlin

Color spaces and Co are super confusing and the internet also seems to contain a lot of misconceptions. It's specific to HDR, but I found this video here a good intro:
yedlin.net/DebunkingHDR...

9 months ago 0 0 1 0
crepererum - Skin Cancer Screening in Hamburg Places that offer free skin cancer screening for people under 35 years

Skin cancer screening in Hamburg

crepererum.net/skin-doctor/

10 months ago 2 0 0 0
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crepererum - Colorful Republic A colorful plot of the 2025 German elections

New blog post: Colorful Republic

crepererum.net/colorful-rep...

1 year ago 2 0 0 0
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feat: add `Extensions` to object store `GetOptions` by crepererum · Pull Request #7170 · apache/arrow-rs Which issue does this PR close? Closes #7155. Rationale for this change See #7155. What changes are included in this PR? The Extensions type and the new GetOptions::extensions field. Are there any ...

Both could be worked around though using a private helper trait like in github.com/apache/arrow...

1 year ago 1 0 0 0

Thinking about this more, I think there might be other reasons for these vtables:

1. Trait upcasting isn't stable yet (scheduled for 1.86).
2. Some interfaces like `Clone` aren't dyn safe, so you cannot dyn dispatch through a `Box`/reference.

1 year ago 1 0 1 0

Well, I'm not actually sure it IS faster. At least I haven't seen a good explanation of why that would be the case.

1 year ago 1 0 2 0
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RawWakerVTable in std::task - Rust A virtual function pointer table (vtable) that specifies the behavior of a `RawWaker`.

For example:
- doc.rust-lang.org/std/task/str...
- github.com/tokio-rs/tok...

1 year ago 1 0 1 0

I've been thinking about vtables recently. Why is a manual implementation that captures function pointers faster than `Box<dyn Trait>`?

1 year ago 0 0 1 0
crepererum - Defaults Matter

crepererum.net/defaults-mat...

1 year ago 1 0 0 0