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letitbeirie

594 karma · joined June 23, 2019

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letitbeirie··on A good measurement culture where numbers don’t replace common sense
> tying OKRs to bonuses

Goodhart's Law: "Any observed statistical regularity will tend to collapse once pressure is placed upon it for control purposes."

[0] https://en.wikipedia.org/wiki/Goodhart%27s_law

letitbeirie··on Accidentally Load Bearing
I think it was something like

|---]/[---[ONS]---[MOV]---|

letitbeirie··on Accidentally Load Bearing
The most haunting comment line I've ever seen was buried deep in an Allen Bradley PLC:

> I don't know why this rung is needed but delete it and see what happens for yourself

Did not fuck around; did not find out.

letitbeirie··on Infrared may no longer be a punchline, as IEEE approves 9.6Gbps wireless light
Probably harder in a practical sense - its signal doesn't travel through walls or most commercial windows so the intercepting sensor would have to be located in the same room (if indoors) or have a heroic signal/noise ratio to avoid getting washed out by sunlight (if not).
letitbeirie··on Infrared may no longer be a punchline, as IEEE approves 9.6Gbps wireless light
This is pretty cool - being able to identify/segregate traffic by its physical room seems like it would be a useful tool for anyone in security, university professors giving exams, etc.

I can't really see it totally replacing WiFi though. It's hard enough to get a TV remote to work outside in the shade - getting higher-bandwidth IR-based WiFi to work outside in the sun seems... ambitious?

letitbeirie··on A Bill Gates Venture Aims to Spray Dust into the Atmosphere to Block the Sun
Does he want to call it "Operation Dark Storm" by chance?
letitbeirie··on Ubuntu Plans to Ditch Its ‘Minimal’ Install Option
They have a version (LMDE) based directly off Debian. It's slower to get updates (because Debian) but it's pretty much the same apart from that.
letitbeirie··on GTA Online Fans Furious as 180+ Cars Are Removed, Some Now Paywalled
> What if your cable provider removed a bunch of channels you pay for, but haven’t watched yet

Isn't this about people getting upset over Rockstar removing cars they didn't pay for though?

letitbeirie··on First 'tooth regrowth' medicine moves toward clinical trials in Japan
Yeah even if the bacterium magically took care of gum health, it would need to somehow be able to dissolve tartar (calcium phosphate) without dissolving teeth (also calcium phosphate).
letitbeirie··on The best place to drink is the emptiest bar in the city
I think that's a pretty astute observation.

Visiting the UK (from the US) it was pretty clear that the social boundaries were different, but the general nature of the game was the same - we're both guess cultures: you have to figure out what to say and how to say it.

In the Netherlands, conversation seemed much more unguarded. It's hard to describe but it's similar to a concept in the US of someone "having no filter" - basically, less verbal softening of uncomfortable/taboo subjects and more willingness to engage with them.

I actually find the Dutch way very refreshing in some ways. Soliciting critiques (e.g. "how does my new haircut look?") is a largely pointless exercise in the US because there's strong social pressure to say "it looks great" whether it's true or not.

I do wonder though if the Dutch way of making friends (as adults at least) has to be wildly different than in the Anglosphere, given how big a role those subtle social cues play here.

letitbeirie··on Unexpected downsides of UUID keys in PostgreSQL
It also buys you that support in the driver libraries.

I ran into this last year - storing them as UUIDs works great, unless all of the drivers for the language you're using (Go, in my case) try to cast/validate those bytes as a UUID before you can access them.

letitbeirie··on Unexpected downsides of UUID keys in PostgreSQL
Postgres supports UUIDs natively
letitbeirie··on Make microservices look like monoliths
> at some point monoliths can get large enough that upgrading libraries or runtimes becomes an incredibly difficult problem

Some languages (e.g. Go) make this easier than others by allowing two versions of the same import to coexist, but this is why we broke up our Django monolith a few jobs ago.

letitbeirie··on Running a movie theater is more expensive than you can possibly imagine
> 2.5 hours of entertainment in a climate controlled and comfortable environment

I watched probably half of the movies I've ever seen during my last summer of college because the house I lived in didn't have air conditioning and the second-run theater 3 blocks away did.

letitbeirie··on Help make mass surveillance of entire populations uneconomical
Basically a digital dead drop.
letitbeirie··on “Luxury” construction causes high rents like umbrellas cause rain
Suddenly? No.

Gradually? That's roughly what's happening in Denver right now - nobody's been building anything but luxury castles for years, but we saw our average rent drop last quarter for the first time since the recession.

Reason? There were 11,000 more units available than there were this time last year and there are 40k more on the way, so apartment managers are having to think about vacancy rates instead of myopically focusing on profit per unit for the first time since... probably the recession again.

https://www.denverpost.com/2023/01/25/apartments-metro-denve...

letitbeirie··on New macOS malware steals info, including a user's entire Keychain database
Whenever an app that has no business knowing my location asks for it, I always wish that iOS "Always Share/Share While Using/Share Once" modal had the additional option "Share Fake Location."

I get why it doesn't (the problems it would cause for Uber and DraftKings immediately come to mind) but the more sketchy advertisers there are who want to track my location data, the more I want that data to be garbage.

letitbeirie··on Why computer modeling should become a popular hobby (1996)
It's good to have the occasional reminder that the letterboxing modern websites use is not, in fact, a total waste of screen real estate.
letitbeirie··on E.P.A. Is Said to Propose Rules Meant to Drive Up Electric Car Sales Tenfold
Not to mention the other metals that go into EV batteries - switching to 100% EV production means jaw-dropping increases in demand for copper, zinc, nickel, chromium, molybdenum, graphite, etc.

Then there's the fact that Russia is a top 3 worldwide producer of half of that list.

letitbeirie··on Tech Firm Lists ‘Whites’-Only Job, Blames Employee, Nukes Online Presence
My favorite part is the "[Don't share with candidates]" (helpfully shared with the world) at the bottom
letitbeirie··on How to be a -10x Engineer
Oblig: https://xkcd.com/927/
letitbeirie··on Cobble_stone – The texture of your childhood (2021)
I'm pretty sure Top Gear has used the exact sound of the siege tank from Starcraft going into siege mode a few times before.
letitbeirie··on America Is Trying to Electrify. There Aren’t Enough Electricians
> No shit smart people are studying coding instead

It's hard to come anywhere close to software money as a licensed EE designing the electrical things, let alone as the one building them.

letitbeirie··on An Introduction to Class Warfare for the Software Engineer
> hostile to other workers

It's also hostile to the practitioner if they last long enough at the same company.

I end up reinventing my "clever" (until I forget the context at least) hacks more often than I care to admit and I'm not actively trying to sabotage my company.

letitbeirie··on Air-to-Air Heat Exchangers for Healthier Energy-Efficient Homes
Depending on where the furnace is located, it can be cheaper and have a lower carbon footprint.

In my area of the US for example, gas costs 32¢/therm, which equates to 1.1¢/kWh.

Electricity on the other hand costs 6.4¢-10.9¢/kWh (depending on time of day), and while a third of it comes from renewables, another third of it comes from coal, so it ends up being net worse for the environment than just burning the gas.

letitbeirie··on Why Go and Not Rust? (2019)
If you're using `json.Marshal`, you're using `reflect` [0]. It's slow and it's an absolute gold mine for runtime errors, but sometimes it's the best tool for the job.

[0] https://cs.opensource.google/go/go/+/refs/tags/go1.19.5:src/...

letitbeirie··on Ask HN: What do you talk about in 1-on-1s with your managers?
> Create a culture that allows employees to come to you when THEY need to.

This is great advice in general but regular 1v1s give you a forum to proactively ask employees how things are going, which can help you detect problems quieter employees are having that they might not be willing to raise themselves. Some people are conditioned not to complain, but that doesn't necessarily mean they're happy.

letitbeirie··on Rackspace founder says it’s ‘on trajectory of death.’
> running them more successfully

The time scale that success is defined on is important here.

The root of the issue seems to be that manager types don't view profit as the market's reward for making a good product; they view it as the product itself.

If a product's quality is sufficiently high to begin with this can be great.

Once quality dips to the point where it softens demand though, it can be the beginning of the death spiral [0] (tl;dr: when production chases revenue downwards and the company suffocates under its fixed costs), and market perception/demand lags cost-cutting product changes so the causes and effects can be very difficult to link through financials alone.

[0] https://www.accountingcoach.com/blog/what-is-the-death-spira...

letitbeirie··on Stanford hates fun
That's unreal. One bad year for admissions and the administrators will outnumber the students.
letitbeirie··on The cold hard truth about electric vehicles in winter
At those temperatures you're up against the flash point of gasoline, which is already the lowest of any (liquid) fuel I can think of.
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