BC INTERNET

Saved by @Alex1Powell

Dave Anderson
@dave_universetf 3 years, 4 months ago 321 views

Save to PDF Share See On Twitter

Hooray, my IPv6 parser is mostly working, and only missing the final cursed case.

It's done. By god, it's done.

I mean, parseIPv6 is also awful and embarassing and much worse than the stdlib implementation right now. But is it at least faster than the stdlib?

Ope never mind, other tests are failing still. Bah.

lol, fuck. Not only is it 50% slower than the stdlib's parser, it's also not alloc-free.

oh, it's because it's benchmarking parsing a zone, and we have to intern the zone... I think.

Yess. For IPs without a zone, my parser is faster and alloc-free. Not hugely faster mind you.

I guess if you squint, it's about as good as the IPv4 parser. It has to touch 4x more bytes, so just under 4x slower isn't that bad.

That said, I'm pretty sure my code is a branch predictor's nightmare right now, not to mention it's entirely unreadable even by my low standards. Needs another round of improving, now that it passes tests.

I think it's time to checkpoint and play Elite Dangerous tonight, but the plan for tomorrow is to see if I can't turn this into a more explicit state machine, so that the code is considering fewer possibilities at any one time.

In general, I think all IPv6s parse in 4 stages:
- Hex before ellipsis
- Hex after ellipsis
- Embedded IPv4
- Zone suffix

All but the first are optional, and the conditionals to decide which new state to transition to is a bit ugly...

... But I think within each state the "happy loop" condition is simple and should keep the CPU and branch predictors pretty happy.

Current WIP, as I pack in for tonight to go play Elite: https://t.co/acwEFavxQi

WARNING: side-effects may include eye bleeding and stomach ulcers.

It also still has a bunch of debugging code in it, the comments may not match the code any more, and I haven't yet iterated on the benchmarks and SSA to see what hand-inlining was actually productive vs. harmful. So it's all hand-inlined, in the worst possible way.

The code's definitely not getting submitted like this, but that's my hacking process I guess :)

More from Internet

foone
@Foone

I was hacking a game and accidentally invented a word for when you think someone is trans and you're proud of them for coming out but then you find out they aren't

someone is excited to watch bill nye in science class

This happens because one of the ways I figure out which memory location needs to be modified is by memory-searching for all occurrences and changing the first letter of them

so like if I know the next line of dialog is "Die"
I change it to "Aie" "Bie" "Cie" "Eie" "Fie"

then I see which one shows up in the game

Elky
@Elky_Style

Company
Permanent suspension of @realDonaldTrump
By Twitter Inc.
Friday, 8 January 2021
After close review of recent Tweets from the @realDonaldTrump account and the context around them — specifically how they are being received and interpreted on and off Twitter —

we have permanently suspended the account due to the risk of further incitement of violence.

In the context of horrific events this week, we made it clear on Wednesday that additional violations of the Twitter Rules would potentially result in this very course of action.

Our public interest framework exists to enable the public to hear from elected officials and world leaders directly. It is built on a principle that the people have a right to hold power to account in the open.

However, we made it clear going back years that these accounts are

not above our rules entirely and cannot use Twitter to incite violence, among other things. We will continue to be transparent around our policies and their enforcement.

The below is a comprehensive analysis of our policy enforcement approach in this case.

Overview

On January 8, 2021, President Donald J. Trump Tweeted:

“The 75,000,000 great American Patriots who voted for me, AMERICA FIRST, and MAKE AMERICA GREAT AGAIN, will have a GIANT VOICE long into the future. They will not be disrespected or treated unfairly in any way, shape or form

Advertisement

Giovanni Pagano
@giovanni_pag

What are the implications of using hacked data for research?

A short thread inspired by the fact that, before AWs took it down, #Parler was extensively hacked and user data was leaked.

The #Parler dataset seems crazy interesting for doing research, and my first reaction after the breach was to shre it with other #CompSocSci ppl.

However, I started having second thoughts, so what follows is to organize ideas and have it somewhere I can look back to.

2/n

Generally speaking, as far as the ethics of research goes a good advice would be to handle hacked data with caution.

First of all, there's an issue of quality. Data might be altered or incomplete, and the source cannot be considered accountable (assuming src is anonymous).

3/n

Secondly and more importantly, a researcher using the data would probably be violating users’ consent and acting against the data collector's will.

Finally, users’ privacy is at stake, since researchers could see material that users didn’t agree for other people to see.

4/n

Sharing private information without consent might put people at risk of harm.

This is all the more true in cases such as the #ParlerHack, where the leaked information is of particularly sensitive nature, and there’s a high risk of unintended consequences.

5/n

Disclosure Backpack
@DisclosureBP

Affidavit by former head of IT for large Italian defense contractor admitting he uploaded instructions through military satellite to Frankfurt to flip votes from Trump to Biden on election night under direction of US persons. Willing to testify.#ItalyDidIt

Francesco Ciulla
@FrancescoCiull4

One of my purposes for 2021 is to simplify Docker for beginners.

Let's start with some definitions:

🏠Docker host
⚙️Docker engine
❓ Docker client
📝Dockerfile
📑Docker Image
🐳Docker Container
🐙Docker Compose
🪣 Docker Registry
🐳🐳🐳Docker Swarm

Definitions Below 👇

🏠Docker (Active) Host

A computer with Docker installed and the daemon running.

It can process Docker and non-Docker workloads.

⚙️Docker Engine

A Client-Server application. It has 3 components:

- "daemon process": A server that is a type of long-running program.

- "Rest API": to specify interfaces that programs can use to talk and interact with the daemon.

- "CLI": A command-line interface client

❓Docker Client

It sends commands to dockerd, using the Docker API.
It can communicate with multiple daemons.

📝Dockerfile

It's a text document that contains all the commands a user could call on the command line to assemble an image.

You May Also Like

$Joey Tawadrous \U0001f1ee\U0001f1ea$

Joey Tawadrous 🇮🇪...
@joeytawadrous

1) Core attributes of a promising founder worth following:
- Progress/trajectory over time
- How well they lead a team &
- Make the vision happen
- Most impressed when someone is way ahead of where you thought they would be when you check up/see them a few months later.

2) Indie Makers have such a benefit of being small, fast, nimble workers in comparison to big companies.

We can easily pivot and vastly change a project of ours. We can change as we learn more about our users.

Big companies can take months/years for even the smallest of pivots.

3) Before you find a product market you can pivot your project as many times as necessary until you find something that works.

Then you only have one thing to do: scale, scale, scale.

4) Be obsessed with the little details.
- listen to every single person who uses your product
- reply to every single person who emails you about your product
- ask them what they like and do not like
- iterate your product, make changes, pivot if necessary

5) Paul Graham's (@paulg) name came up with a feeling of great admiration! Naturally! It was Paul who said:

In the early stages of a company just;
- write code
- talk/sell to customers to stress test your idea

Nothing else.

Shalini Singh Sengar
@Maverickmusafir

Remembering Colonel Anil Kaul, VrC (Retd) on his 3rd Death Anniversary.

“It was October 12, 1987, exactly 5:55 pm as I was… coming out of the cupola of my T-72 tank on a steamy evening in an unknown place called Kokkuvil in the Jaffna district of Northern Sri Lanka.+

I froze in that confined space at what I saw. An LTTE militant stood at 60 meters aiming his rocket-propelled gun at my tank.

In a flash he fired. Probably having lost his nerve he aimed too low. The projectile hit the left mudguard of the tank, but for some inexplicable reason+

did not explode. It then hit the side of the main gun and then exploded on top of the turret, all in a fraction of a second. Before I knew, it seemed I had received a straight right punch so to say to my chin. I saw some blood appear on my left hand and there was a sharp drop in+

my eyesight.

Lt Colonel (now Lt Gen) Dalbir Singh, then Commanding Officer of 10 Para Commando, who was standing on the engine deck said to me, “Yaar what a close shave.”

He suddenly saw me and the look on his face told me that something was very very wrong with me. In that+

fraction of a second, as if it was a rewind of my entire life, thoughts raced through my life as to how and when I had landed myself in such a situation…

I asked my gunner to pull out a first field dressing (FFD) which is standard equipment in a first aid box carried in each+

Advertisement

Anastasis
@OrdersofM

https://t.co/6cRR2B3jBE
Viruses and other pathogens are often studied as stand-alone entities, despite that, in nature, they mostly live in multispecies associations called biofilms—both externally and within the host.

https://t.co/FBfXhUrH5d

Microorganisms in biofilms are enclosed by an extracellular matrix that confers protection and improves survival. Previous studies have shown that viruses can secondarily colonize preexisting biofilms, and viral biofilms have also been described.

...we raise the perspective that CoVs can persistently infect bats due to their association with biofilm structures. This phenomenon potentially provides an optimal environment for nonpathogenic & well-adapted viruses to interact with the host, as well as for viral recombination.

Biofilms can also enhance virion viability in extracellular environments, such as on fomites and in aquatic sediments, allowing viral persistence and dissemination.

$Corey Haines \U0001f4a1$

Corey Haines 💡...
@coreyhainesco

I think I'm giving up on mainstream marketing content.

I'm giving up on social media consumption too.

So little substance.

Need to devote more time doing. More time creating.

Who needs another "5 ways to boost growth" post? I click and am disappointed every time. Not again.

I don't want to poop on content marketing, but marketers need to step it up.

Or at least, founders need to know that doing something is not always better than doing nothing.

Why is content marketing not as effective as it used to be? An innumerable amount of factors...

But one things for damn sure.

Things have to change.

Two of the chief sins:
1. Unoriginal research/story/study/etc
2. Not having anything more to add that's meaningful

Why blog/podcast/vlog/etc about something that's already been said? Already been done?

Do we really need another interview with founder of x hot startup? Do we really need another ultimate guide about facebook ads?

Not all content is like this...

Sometimes, you get an occasional piece that truly leaves you better off than you were before. That doesn't make you want to skim.

An original case study. A first time interview with a founder. An honest account of an experiment. An explanation of a change, shift, or realization.

$Andrey \uf8ff Azimov$

Andrey  Azimov
@AndreyAzimov

The best way to know if people like your product is NOT:

- Have a lot of emails in the waiting list
- Become #1 on PH
- Become #1 of HN or Reddit
- Have people that saing "I'll pay"
- Have a lot of free users

The best way to know if they're actually pay for it.

The only thing that matters is your product providing a value, and you can't know this until people will pay money for it.

We can have a first signal of a product/market fit after the launch by check how many sales we've got in the first 24h. Some scale:

200+ This has a high potential.
100+: This has a potential.
50+: Some people need it.
10+: People almost don't need it.
0+: People don't need it.

This is for a single time payment product. For a subscription probably it should be less because people hate subscription.

And obviously, you should have a lot of traffic like 3-5k+.

Here is a stat for my products (macOS apps) for the first 24h after the launch: