BC INTERNET

Saved by @Alex1Powell

Dave Anderson
@dave_universetf 5 years, 7 months ago 593 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

Nat Cohen
@domainarts

I sympathize with mid-size companies seeking to acquire a premium domain name. Even if they stretch to make the maximum possible offer, it often still can't compete with what a larger company can offer. Their desired domain name remains always out of reach. /1

From the broker:

"The prospective buyer responded and explained that their absolute maximum amount they can spend is $100,000 USD. They are accountants and explained this is an extraordinary amount of money for them." /2

The distribution of how much a domain name is worth to a particular company may look approximately like the right half of a bell curve, with values increasing along the X-axis and the # of companies for which the domain name has that value on the y-axis. /3

Since each domain name is unique, a domain owner wishing to maximize the value of that asset will often wait for an offer in the (light green) rightmost tail of the distribution, from that small percentage of companies for whom the domain name will deliver the most value and /4

as a result can justify making the highest value offers for the domain name. But that means that the domain name will remain out of reach for the vast majority of companies that would benefit from owning the domain name. For even a company at the 80th percentile, in the /5

Eric Seufert
@eric_seufert

Facebook -- having taken out full-page ads in the NYT, Washington Post, and WSJ -- is generally seen as the primary victim of the new app privacy controls coming in iOS14. But Google is perhaps even more vulnerable to ATT. Why has Google remained silent? (1/X)

2/ First, background: here's a high-level overview of how ATT / IDFA deprecation impacts advertisers and ad networks, and why this whole ordeal has put advertisers and ad networks into a state of panic:

3/ Google is equally as susceptible to harm from ATT as Facebook. Google's UAC product -- esp its tROAS and tCPA campaign objectives -- relies as much on IDFA-indexed monetization and engagement data as FB's mobile product does. But Google has one big weakness wrt ATT: YouTube

4/ Broadly, view-through attribution accounts for a disproportionate % of conversions from YouTube app install impressions. This means: user sees the YT ad, doesnt click, downloads app later, & Google is able to claim it by reconciling IDFA seen at impression to IDFA seen in app

5/ View-through attribution is nonexistent in the ATT paradigm as it relies on the IDFA; some significant portion of YT's attributed conversions will evaporate. So why isnt Google vocally opposing ATT? Two reasons: consumer optics and its duality as ad network / mobile platform

Advertisement

Jonas L
@jonasLyk

Wanna disable Defender when enabled Isolated Core and Tamper protection?

Its a bit more trouble- but doable, without ruining Isolated Core/Secureboot etc.

Defenders process will run as a unkillable protected service- so new tricks needed.

Here we go:

Ok- tamper protection is easy, just make .bat - run as adm:
:again
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WdFilter\Instances\WdFilter Instance" /v altitude /t REG_SZ /d -1 /f
goto again

Then unload minifilter with process hacker:

The registry key will be changed while the minifilter do not protect it, when tamper protection makes the driver load again it cannot attach to volumes nor protect registry keys.

Removing it will make it recreate, but invalid altitude do the trick

Notice now the service is: Protected light(antimalware)
Now we cant do anything to the service/process- not even see its open handles.

Lets start by elevating to SYSTEM- just launch a command prompt, then close process hacker- and run it again from the command prompt.
Now process hacker runs as SYSTEM

Nathaniel Ho-Ho-Horada...
@NW_Horadam

If you're looking at GA EV data and thinking maybe the reason D turnout looks strong relative to 11/3 is because after 2 months of Trump/GOP officials trashing mail-in ballots GOP voters are ditching it for E-Day instead...

Boy do I have some mindblowing statistics for you...

I compared the current mail-in voting tallies for each Congressional District against November mail-in votes for those districts.

The statewide figure currently sits at 62%. Guess which district leads the state?

You guessed it!

GA-14 at 69%. Marjorie Taylor Greene's district.

#2 is GA-8 at 68%.

Jody Hice of "I'm joining Marjorie Taylor Greene in her effort to throw out the Electoral College vote" fame.

GA-9 (Doug Collins) is above the state average at 64%.

IF Republicans were ditching absentee balloting en masse to vote on Election Day, you'd expect to see it by now. But the early *in-person* voting totals are what's actually lagging, not mail-in voting.

Pardon the sloppy spreadsheet, but those last 4 columns are what I'm looking at. The last one in particular.

Chris Heilmann
@codepo8

🚨 🦮 Seven ways to test for accessibility using only what is already in browser developer tools of Chromium browsers https://t.co/C7kdbigHGE

@MSEdgeDev @EdgeDevTools @ChromiumDev
#tools #accessibility #browsers
Also, a thread: 👇🏼

Issues pane, powered by @webhintio, listing accessibility issues with explanations why these are problems, links to more info and direct links to the tools where to fix the problem. https://t.co/4K5RynHhbg

The inspect element overlay showing accessibility relevant information of the element, including contrast information, ARIA name, role and if it can be focused via keyboard.

Colour picker with contrast information offering colours that are AA/AAA compliant. You can also see compliant colours indicated by a line on the colour patch.
Note: the current algorithm fails to take font weight into consideration, that's why there will be a new one.

Vision deficit ("colour blindness") emulation. You can see what your product looks like for different visitors.
https://t.co/bxj1vySCAb

You May Also Like

Cole Escola
@ColeEscola

If you know me, you know I don't like broadcasting details about my personal life on this website, but I have been getting asked why I'm not doing Christmas this year so I just wanna put this whole mess to bed. First of all, I don't agree with gay marriage... (1 of 4,625)

... full of dog food and she said, "I'm pretending this is ice cream! Treat me like a baby!" and proceeded to hump her own arm and I thought, "something tells me this isn't the real Norah Jones"... (117 of 4,625)

...cost me $7,000. I had to put it on two separate credit cards! It wasn't 'til I got to my car that I realized "that's way too expensive for one onion." But I didn't have time. Amanda Seyfried was begging to change my diaper... (1,001 of 4,625)

...another Christmas miracle. Mistletoe, stockings, sleigh bells, snow! All these things I have put up my ass. The taste of coffee... (2,974 of 4,625)

...I felt a *very* cold finger on my cheek and I turned around and I said, "Grandma?" and she goes, "Surprise, I'm alive and I work at Sears!" I said, "okay"... (3,047 of 4,625)

Vibhu Vashisth
@VIBHU_Tweet

Rani Chennamma of Kittur was one of the first women rulers of India who fought against the might of the British Empire in 1824. Rani Chennamma was born in 1778 in a small village of Kakati in Belgaon distt of the State of Karnataka.

She was born into the Lingayat Community to a man named Dhulappa Desai. From a very young age she was trained in horse riding,sword fighting, archery and diplomacy. At a very young age of 15 yrs, she was married to the King of Kittur and became the Queen of Kittur.

It is said that King of Kittur Mallasarja was once moving around in the neighbouring kingdoms to find support to fight Tipu Sultan. It is then, when he came across Chennamma and he immediately got attracted to her sheer confidence and bravery.

Rani Chennamma and King Mallasarja had a son together who died very soon after the death of King Mallasarja in 1816. As the Queen of Kittur, Rani Chennamma immediately adopted Shivalingappa as her son and declared him the heir to the throne of Kittur.

This did not go well with the British East India Company who was enforcing the Doctrine of Lapse those days, according to which the adopted children of the Indian rulers were not allowed to become their heirs and if the native rulers did not have children of their own, their...

Advertisement

$\U0001f1ee\U0001f1f3$

🇮🇳
@Aamani_03

॥ॐ॥
अस्य श्री गायत्री ध्यान श्लोक:
(gAyatri dhyAna shlOka)
• This shloka to meditate personified form of वेदमाता गायत्री was given by Bhagwaan Brahma to Sage yAgnavalkya (याज्ञवल्क्य).

• 14th shloka of गायत्री कवचम् which is taken from वशिष्ठ संहिता, goes as follows..

• मुक्ता-विद्रुम-हेम-नील धवलच्छायैर्मुखस्त्रीक्षणै:।
muktA vidruma hEma nIla dhavalachhAyaiH mukhaistrlkShaNaiH.

• युक्तामिन्दुकला-निबद्धमुकुटां तत्वार्थवर्णात्मिकाम्॥
yuktAmindukalA nibaddha makutAm tatvArtha varNAtmikam.

• गायत्रीं वरदाभयाङ्कुश कशां शुभ्रं कपालं गदाम्।
gAyatrIm vardAbhayANkusha kashAm shubhram kapAlam gadAm.

• शंखं चक्रमथारविन्दयुगलं हस्तैर्वहन्ती भजै॥
shankham chakramathArvinda yugalam hastairvahantIm bhajE.

This shloka describes the form of वेदमाता गायत्री.

• It says, "She has five faces which shine with the colours of a Pearl 'मुक्ता', Coral 'विद्रुम', Gold 'हेम्', Sapphire 'नील्', & a Diamond 'धवलम्'.

• These five faces are symbolic of the five primordial elements called पञ्चमहाभूत:' which makes up the entire existence.

• These are the elements of SPACE, FIRE, WIND, EARTH & WATER.

• All these five faces shine with three eyes 'त्रिक्षणै:'.

$\U0001f1fa\U0001f1f8I Support Our Military & Law Enforcement\U0001f1fa\U0001f1f8$

🇺🇸I Support Our Milita...
@TheWiseOwl_AZ

1. There are more people added on the list of arrests and executions of famous people but no further intel is available at this time.

ARRESTS and EXECUTIONS OF FAMOUS PEOPLE 2020 UPDATED
Explanation of the latest military tribunal arrests and executions of famous people in 2020.

2. The tribunals are arresting these people in plain clothes. We saw the Obama’s arrest, although we didn’t know it was an arrest at the time. The arrest was done nonchalantly so as to not get noticed by the public.
All arrests of these famous people were done this way.

3. If the person is convicted of child sex trafficking, crimes against humanity or treason, they will be executed.
If the person arrested has evidence on someone else to help their prosecution, or is willing to help Trump, & they want to cooperate, they may be allowed to do so.

4. A sentence of execution down to life in prison may be accepted if their evidence is worth anything.
When a plea deal is done, the defendant must present evidence they have to make their sentence lighter. This information is given to the prosecution, defense, and to the judge.

5. If evidence is accepted, they are presented the plea deal. They will have to make a guilty plea to the crime with a video confession & written statement. That is how all plea deals work.

All famous people arrested were either treasonous or involved in satanic worship rituals.

Pran Katariya
@KatariyaPran

The Straddle is my favorite trade these days. But more often than not, one needs to adjust to make a good return from it. There are many ways to do this depending on your view, psychology and imagination. Will discuss a few that I use

The Straddle is a delta neutral strategy and it is important to keep deltas in check during the course of the Trade and not let them run away from you. Of course Volatility is the elephant in the room- but not going there as that will require a separate discussion

The first and most common method is to go 'inverted.' That is to say to shift the untested side to generate additional Premium and increase the runway to Breakeven. So if you start with a Straddle at 700 and price goes to 740, you can move the PE up to say 720.

How much should you move the untested side? While again this is a matter of skill, experience and artistry, the rule of thumb is to cut deltas by half. Remember, prices will move and you have to allow sufficient room for them to fluctuate

The second method is to shift the entire Straddle in the direction of the move. So if you have a 700 Straddle and Price goes to 740, you can shift the Straddle to 720. If you time this right, it can generally be done at virtually no cost or minimal cost.