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Robᵇᵉᵗᵒ Graham
@ErrataRob
, 4 tweets, 1 min read Read on Twitter
Studies proving it's 10x less expensive to fix bugs earlier in development before release/production have been with us since the 1980s, and have always been wrong.
2/ Yes, it's always true that for a bug you find in release/production, it would've been cheaper to fix had you found it earlier in development. But that's just hindsight fallacy, assuming it was cheaper/easier to find than it was.
3/ Finding bugs in development experiences decreasing marginal returns. That means while you can catch a lot of bugs with little effort, each additional bug gets more and more expensive to find.
4/ That means no matter how much you spend, there's yet one more bug that your customers will find in release/production fairly easily.
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More from @ErrataRob see all

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Robᵇᵉᵗᵒ Graham
@ErrataRob
So there's three answers:
1. bandwidth
2. compression algorithm
3. color range
The first problem is color range. We use only 8-bits or 256 levels for each of red, green, and blue colors. This is enough when colors are far from each other, like bright white on top of black, but not enough when they are close, black on slightly darker black.
In the future, HDR TVs with 10 bit color will improve upon this, but in the meanwhile, we are at a level of poor color resolution where problems will show themselves.
Read 13 tweets
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Robᵇᵉᵗᵒ Graham
@ErrataRob
In case you were curious what’s inside a smart IoT lightbulb
The PCB is essentially a power supply, with the WiFi module plugged into it (FCC ID TE7LBM100). The antenna portion sticking out will stick up through that rectangular whole in the LED portion, along with the power wires.
This smart bulb is one that allows shades of white (different color temperatures), so it mixes two types of LEDs, and has two power wires (plus ground) controlled by the WiFi module.
Read 6 tweets
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Robᵇᵉᵗᵒ Graham
@ErrataRob
Greatest movies in the MCU 22 film, 11 year story arc:
1. Ironman
2. Avengers #1
3. Ragnarok
4. Avengers Endgame
(I know you disagree, but you are wrong)
I said "greatest" not "best", as I'm using a different yardstick. Ironman is the greatest not only because it was very good, but how it sets everything in motion. It starts an ambitious plan that somehow worked over the next 11 years.
Likewise, the first Avengers movie is very good, but what makes it great is that it actually was very good. Hollywood can stick 6 of your favorite superheroes in a movie and fanboys will flock to it no matter how bad it is, so it doesn't have to be good. But it was.
Read 8 tweets

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Jeremiah Grossman
@jeremiahg
While various research suggest that software bugs are ~5-10x less expensive to fix during the SDLC than waiting till production, this financial analysis should NOT be used as justifiction to find-fix vulnerabilities earlier. /1
Let's assume fixing the average [website] vuln (SQLi, XSS, etc) requires ~40 man-hours to prioritize developer time, create a patch, QA/regression test, and finally push to production. At $100hr, the cost to fix each vuln in prod is $4,000. /2
The average website may have around ~20 individual vulns reported annually. Therefor the total cost to fix ALL these vulns, at the most expensive stage (Prod), is $80,000 ($4,000 x 20) / 3
Read 6 tweets
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Zee (He/Him)
@zspencer
Bugs are the gaps between tested-hypothesis and untested hypothesis.

The more validated the hypothesis, the less likely to be bugs.

The most validated hypothesis is tested automatically.
Seeing @mipsytipsy and @CatSwetel talk about testability and testing in production; plus factoring in @davidjbland's experiment mapping...

The evolution of TDD to BDD is now HDD; Hypothesis driven development.
@mipsytipsy @CatSwetel @davidjbland We don't write unit tests. We don't write feature tests. We write _hypothesis tests_.

These are written as hypothesis that you would apply to a value proposition design or a business model canvas.
Read 10 tweets
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Sajith Pai
@sajithpai
Thinking aloud on the likely Uber Eats - Swiggy Deal (not yet confirmed). What follows in this tweet thread is not based on facts (but hard to come by) and some theorizing and speculation.

Caveat: I am an interesed party given Blume's stakes in Zomato (via Runnr) and Dunzo. /1
Uber Eats selling itself to Swiggy, with Uber getting ~10% stake in Swiggy (last valued at $3.3b in Dec-18) means it is effectively buying a tenth of Swiggy for what it has invested in Uber Eats. /2
Let us look at what Uber Eats has invested (effectively the burn, which is revenue from food orders less what it is spending to service the orders) - we have the recent stat that $25m is its burn for Dec-18 for 9m orders / month (or 3lacs / day). /3
Read 12 tweets
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Meeting C++
@meetingcpp
Yes, you can't really rely on the debugger as your major dev tool for Modern C++.
But Modern C++ does not stem from that school of thought, that the debugger should be a major dev tool... #LastRT
Well, seems that tweet needs some context.
Its a reaction and reflection on this blog post: aras-p.info/blog/2018/12/2…
Specificly on the debugging parts and performance of non release builds.
Also its wording isn't perfect, so lets get into the details with a thread.
First, I don't say that you shouldn't use a debugger. You can with Modern C++, its just not the best combination, as performance in non optimized builds is not always where Modern C++ shines. But that hasn't hindered this part of the language to flourish.
Read 15 tweets
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Stacy McGaugh
@DudeDarkmatter
Dark Matter Hunters Pivot After Years of Failed Searches - WIRED

“Pivot” is an interesting choice of words. Sorta implies that one is pivoting from one thing (WIMPS) to something else. In which case the “something else” needs to be specified. apple.news/AfFMHcOI9QlK8e…
The whole dark matter search community reminds me of Daffy Duck in the episode quoted from IMDb here. [shockingly, I do not instantly find a gif of Daffy falling off said cliff.]
Reading this article does not inspire confidence. Sounds more like they’re poised to make the same mistakes all over again. Having spent decades in a fruitless search for WIMPs motivated by the WIMP miracle - an irrelevant numerical coincidence - might they decide to learn more?
Read 22 tweets
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Rep. Don Beyer
@RepDonBeyer
Earlier this week, a former Trump campaign staffer and senior aide to EPA Administrator Scott Pruitt came to Capitol Hill to voice concerns about Pruitt's actions.

He met with staffers for @SenWhitehouse, @GerryConnolly, @SenatorCarper, @RepCummings, and a member of my staff. 1/
Kevin Chmielewski was one of the Trump's earliest campaign aides.

Later he became Deputy Chief of Staff for Operations at the EPA under Scott Pruitt. While working there, he witnessed significant wrongdoing.

He told us about it. This is what he said: 2/ medium.com/oversightdems/…
He was told when he started that working there would be a "nightmare." This proved to be true.

Mr. Chmielewski said that Pruitt habitually marginalized, removed or retaliated against employees who stood up to Pruitt or refused to take troubling actions for him. 3/
Read 13 tweets

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