lysdexic

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[–] lysdexic 0 points 1 month ago* (last edited 1 month ago) (24 children)

From the article.

Josh Aas, co-founder and executive director of the Internet Security Research Group (ISRG), which oversees a memory safety initiative called Prossimo, last year told The Register that while it's theoretically possible to write memory-safe C++, that's not happening in real-world scenarios because C++ was not designed from the ground up for memory safety.

That baseless claim doesn't pass the smell check. Just because a feature was not rolled out in the mid-90s would that mean that it's not available today? Utter nonsense.

If your paycheck is highly dependent on pushing a specific tool, of course you have a vested interest in diving head-first in a denial pool.

But cargo cult mentality is here to stay.

[–] lysdexic 3 points 1 month ago (2 children)

However, we’re still implementing IPv6, so how long until we could actually use this?

We can already use custom verbs as we please: we only need to have clients and servers agree on a contract.

What we don't have is the benefit of high-level "batteries included" web frameworks doing the work for us.

[–] lysdexic 1 points 1 month ago (1 children)

So that’s where I would say, as long as performance doesn’t matter it’s better to default to B-Tree maps than to hash maps, because the chance of avoiding bugs is more valuable than immeasurable performance benefits (...)

I don't quite follow. What leads you to believe that a B-Tree map implementation would have a lower chance of having a bug when you can simply pick any standard and readily available hash map implementation?

Also, you fail to provide any concrete reasoning for b-tree maps. It's not performance on any of the dictionary operationd, and bugs ain't it as well. What's the selling point that you are seeing?

[–] lysdexic 3 points 1 month ago (3 children)

the reason I tend to recommend B-Tree maps over hash maps for ordinary programming is consistent iteration order.

Hash maps tend to be used to take advantage of constant time lookup and insertion, not iterations. Hash maps aren't really suites for that usecase.

Programming languages tend to provide two standard dictionary containers: a hash map implementation suited for lookups and insertions, and a tree-based hash map that supports sorting elements by key.

[–] lysdexic 1 points 1 month ago* (last edited 1 month ago) (2 children)

Yeah, the quality on Lemmy is nowhere (...)

Go ahead and contribute things that you find interesting instead of wasting your time whining about what others might like.

So far, all you're contributing is whiny shitposting. You can find plenty of that in Reddit too.

[–] lysdexic 2 points 1 month ago* (last edited 1 month ago)

It’s from 2015, so its probably what you are doing anyway

No, you are probably not using this at all. The problem with JSON is that this details are all handled in an implementation-defined way, and most implementation just fail/round silently.

Just give it a try and send down the wire a JSON with, say, a huge integer, and see if that triggers a parsing error. For starters, in .NET both Newtonsoft and System.Text.Json set a limit of 64 bits.

https://learn.microsoft.com/en-us/dotnet/api/system.text.json.jsonserializeroptions.maxdepth

[–] lysdexic 4 points 1 month ago* (last edited 1 month ago)

Why restrict to 54-bit signed integers?

Because number is a double, and IEEE754 specifies the mantissa of double-precision numbers as 53bits+sign.

Meaning, it's the highest integer precision that a double-precision object can express.

I suppose that makes sense for maximum compatibility, but feels gross if we’re already identifying value types.

It's not about compatibility. It's because JSON only has a number type which covers both floating point and integers, and number is implemented as a double-precision value. If you have to express integers with a double-precision type, when you go beyond 53bits you will start to experience loss of precision, which goes completely against the notion of an integer.

[–] lysdexic 1 points 1 month ago* (last edited 1 month ago) (3 children)

The only think that TCP_NODELAY does is disabling packet batching/merging through Naggle's algorithm. Supposedly that increases throughput by reducing the volume of redundant information required to send small data payloads in individual packets, with the tradeoff of higher latency. It's a tradeoff between latency and throughput. I don't see any reason for transfer rates to lower; quite the opposite. In fact the very few benchmarks I saw showed exactly that: TCP_NODELAY causing a drop in the transfer rate.

There are also articles on the cargo cult behind TCP_NODELAY.

But feel free to show your data.

[–] lysdexic 3 points 1 month ago (5 children)

A reminder that TCP_NODELAY should be set by default,

Why do you believe that?

[–] lysdexic 17 points 1 month ago (1 children)
[–] lysdexic 0 points 1 month ago

It’s very hard for “Safe C++” to exist when integer overflow is UB.

You could simply state you did not read the article and decided to comment out of ignorance.

If you spent one minute skimming through the article, you would have stumbled upon the section on undefined behavior. Instead, you opted to post ignorant drivel.

[–] lysdexic 4 points 1 month ago

I wouldn’t call bad readability a loaded gun really.

Bad readability is a problem cause by the developer, not the language. Anyone can crank out unreadable symbol soup in any language, if that's what they want/can deliver.

Blaming the programming language for the programmer's incompetence is very telling, so telling there's even a saying: A bad workman always blames his tools.

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submitted 1 month ago by lysdexic to c/programming
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CPU Flame Graphs (www.brendangregg.com)
submitted 1 month ago by lysdexic to c/programming
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submitted 1 month ago by lysdexic to c/books
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submitted 1 month ago* (last edited 1 month ago) by lysdexic to c/nodejs
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When Bloom filters don't bloom (blog.cloudflare.com)
submitted 1 month ago by lysdexic to c/data_structures
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submitted 1 month ago by lysdexic to c/cpp
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