BC INTERNET

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Dave Anderson
@dave_universetf 5 years, 6 months ago 570 views

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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

$Alberto Gimeno \U0001f3f3\ufe0f\u200d\U0001f308\U0001f1ea\U0001f1f8\U0001f49c\U0001f90e$

Alberto Gimeno 🏳️‍🌈🇪🇸💜...
@gimenete

I'm going to tell you a little bit how we work on features at GitHub. It's simple, but very powerful in my opinion. At GitHub we have a high performance culture.

We are deploying changes almost all the time while keeping the service running and the deployment failure ratio needs to be super low! We are constantly working on new medium/big features, we have frequent deploys and required peer reviews.

How do we know that big features are not conflicting with each other in functionality and in version control. How do we merge the work done in these non-trivial features? How do we do prevent peer reviews slow down our productivity?

With basically two things: split the work in small batches and feature flags. We don't have long-lived feature branches. We do very small changes all the time and deploy them.

We could split a feature in tens or hundreds of PRs, but until it is beta or GA, we don't expose it to users by using feature flags.

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$Yous \U0001f168$

Yous 🅨
@YousXP

*Thread* - the hack is wack

The Master Life 'Hack' to Solve All Problems

What's easier?

Developing psychology & exerting willpower to not eat a pantry full of your favorite snacks

or

Not having those temptations in the house

Many 'solutions' being presented to people don't work

Designed to cope with the problem instead of resolving it

Darkness is the absence of light

You can't resolve or remove the darkness

You can only add more light

Recent viral obsessions with 'healing', 'being stoic', 'mental models & psychology'

They all serve their place AFTER the root has been handled

Before adding things to increase testosterone, remove what inhibits it

Before adding 'hacks', remove things causing conflict

If a person fears confrontation & is not assertive

Techniques & thinking offer some support, but the real question is

Why is this the default behavior?

Without starting with this question

All solutions are merely Band-Aids to mask & cope with the symptoms

In reality the real root of his fear of asserting himself & confrontation may likely be:

Donald Bullers
@DonaldBullers

The Internet is at a tipping point, here’s what you’ve probably never heard coming next.

Time for a thread 👇👇👇

1) Let’s start with the users…

Today over 50% of the world is on social media AND on average we each have 70-80 usernames and passwords.

Each of these accounts are owned and controlled by the platforms.

Recipe for disaster.

2) In 2021 American adults spend over 4 hours a day online - that is half a work day.

Time is our most valuable asset, did you realize you are giving this away for free?

3) The applications we use today are built on the foundation of ‘Free + Ads’.

You get free access.

They get YOUR account, YOUR data, YOUR screen time, YOUR community.

And the worst part? This can all be taken away at any moment.

4) So where do we go from here?

It starts with self-sovereign digital identities.

ONLY the user owns their identity data online without intervention from outside parties.

Available now at sites like:

CodesUcq
@CodesUcq

1.
01/06/2021 Riot decode via Youtube/Twitch

Symbolism comms allow hiding messages in plain sight, classified data updates, or signals to coordinate crimes.

e.g. I decoded a song that implied Mi6 + CIA used the Radio to coordinate the removal of JFK.

1.
I've gotten a lot of requests to decode the new 17/Q Minute Bob Dylan song about JFK's murder.

Ok.

So first up this isn't a new song except in that it's just been released. The question of why wasn't it released before is worth considering.

https://t.co/FZjO8Dm92l
— CodesUcq (@CodesUcq) March 28, 2020

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