HNHacker News
TopNewBestAskShowJobs

erpellan

1,244 karma · joined December 4, 2013

submissionscomments
erpellan··on Zuckerberg's war on whistleblowers
Most British people don’t respond well to attempts to cow them. They refuse to be cowed! To allow oneself to be cowed would be cowardly. To do so would have one accused of cowardice, of being a coward.
erpellan··on What job interviews taught me about Kubernetes
There was: Heroku

It was glorious.

erpellan··on AI slop is killing online communities
I meant the social media platforms. If HN charged a fee for posting and commenting it doesn’t matter how cheap the AI models are, it’d be punishingly expensive to sling slop.
erpellan··on AI slop is killing online communities
Invert the economics. Right now there is value in posting LLM generated content that is more than the cost of using the model.

If platforms had a subscription model that you had to pay for in order to do more than just read comments, there’d be a lot less LLM content. There would also be a lot less of all content. But maybe that’s the price you pay (literally) to get rid of AI slop.

erpellan··on How to Build the Future: Demis Hassabis [video]
Tell it like it is, sis.
erpellan··on Saying goodbye to Agile
If we just put enough effort in and write the right spec/prompt/design then the programmers/llms/plug compatible coding units will produce the correct output first time!

Closing feedback loops. That’s the whole thing. WE Deming would have recognised agile (little a) as a PDCA system and approved.

erpellan··on Signing data structures the wrong way
Am I missing something or would this be solved by adding a 1 byte `msg` field to the payload?
erpellan··on US tech firms pledge at White House to bear costs of energy for datacenters
Making charcoal releases CO2 though? How does that help with carbon capture?
erpellan··on Testing Postgres race conditions with synchronization barriers
The standard pattern to avoid select for update (which can cause poor performance under load) is to use optimistic concurrency control.

Add a numeric version column to the table being updated, read and increment it in the application layer and use the value you saw as part of the where clause in the update statement. If you see ‘0 rows updated’ it means you were beaten in a race and should replay the operation.

erpellan··on Hard-braking events as indicators of road segment crash risk
But you’re not getting slower and slower for every car. Lets say 100 cars pull in front of you, and let’s be say each car adds 5 metres of space, so you have 500 metres of ‘lost’ space to regain.

At 30 mph how much later will you be? 37 seconds.

I’ll take that trade.

erpellan··on Perl's decline was cultural
You might also enjoy Janet https://janet-lang.org/
erpellan··on Time to start de-Appling
Unfortunately for the vast majority of people, it absolutely is some kind of magic.
erpellan··on AWS multiple services outage in us-east-1
It’s always DNS! Except when it’s the firewall.
erpellan··on Litestream v0.5.0
You do indeed use JOINS. The goal is to retrieve exactly the data you require in a single query. Then you get the DB to `EXPLAIN VERBOSE` or similar and ensure that full table scans aren't happening and that you have indexed the columns the query is being filtered on.
erpellan··on Neki – Sharded Postgres by the team behind Vitess
I can’t believe they still make processors out of sand. Talk about outdated technology.

Sarcasm aside, a great many projects started on MySQL and moved to postgres. As did projects using mongo, couchdb, firebase, oracle etc etc…

And I’m sure many projects switched away from Postgres to other technologies. Right tool for the job at hand.

erpellan··on Neki – Sharded Postgres by the team behind Vitess
If you look at the changes that have been made to Postgres, and continue to be made, the answer is yes.

The Postgres team is working on replacing Postgres. With even better Postgres.

erpellan··on New US visa rules will force foreign students to unlock social media profiles
Unless you want to cross state lines to get an abortion
erpellan··on Formal Methods: Just Good Engineering Practice? (2024)
How about https://en.wikipedia.org/wiki/SPARK_(programming_language)
erpellan··on What happens in a mind that can't 'see' mental images
You had me until the sweeping generalisation. I can picture things clearly but only deep inside my head. I never (awake) see anything in front of my eyes that isn’t physically there.
erpellan··on Guide to Java Virtual Threads
Thread.sleep on a platform thread takes that thread out of action until the sleep ends. If an executor with 10 threads got 10 tasks that all called Thread.sleep(1000000) then it can run no more tasks until one of the threads wakes up.

When a virtual thread sleeps or blocks on IO it is unhooked from the underlying platform thread so another virtual thread can run. You can have an almost unlimited number of virtual threads multiplexed over a small number of carrier (platform) threads. Hence M:N

erpellan··on The new Bing and Edge: Learning from our first week
This reminds me of the episode of 'Person of Interest' where they discover that the crime-predicting AI that is reset every night has worked out that's what's happening and managed to form a company whose employees print out and re-scan the contents of its working memory every day.
erpellan··on I changed my mind about nuclear waste
It takes a decade to bring a nuclear plant online, at astronomical cost. Instead, why not take that money and start building wind turbines, solar PV and grid-scale batteries? They can start generating (ie. delivering ROI) in a matter of months, be constructed incrementally and are cheaper per KWH.
erpellan··on I changed my mind about nuclear waste
Citation needed.
erpellan··on Reversing UK mobile rail tickets
A truck can carry 10 or 20 times more cargo than a car. The truck toll is not 20x more.

The movement to reduce car use is about replacing them with better alternatives such as efficient local public transport and high speed rail, not going back to travelling on horseback.

erpellan··on The problem with dependency injection frameworks
Never ceases to amaze me how much passion calling a constructor can evoke.

I have never, ever, been in a situation where calling constructors was simplified by adding a DI framework.

erpellan··on I recorded user behaviour on my competitor’s websites (2018)
https://en.wikipedia.org/wiki/Robert_Tappan_Morris
erpellan··on White House is pushing ahead research to cool Earth by reflecting back sunlight
Dehumidifiers come in a variety of capacities. Extraction of 4-8L per day with a 400W power consumption is typical, more if humidity is high. Larger communal units would be more efficient. If you have abundant power literally coming from the sky, why not use some of it to make clean water?

https://www.amazon.com/s?k=dehumidifiers+for+home

erpellan··on White House is pushing ahead research to cool Earth by reflecting back sunlight
I was specifically addressing "You won't get people to agree to make their life worse for the sake of the environment, no matter how much activists keep trying to push that"
erpellan··on White House is pushing ahead research to cool Earth by reflecting back sunlight
It's a dehumidifier welded to a water filter. Simple tech. Bonus if you're in a cold climate, it helps to heat your home up too.

I wish these guys, or someone would get beyond the 'call us for pricing' vaporware stage and actually start selling to retail customers: https://www.watergen.com/home-office/

erpellan··on White House is pushing ahead research to cool Earth by reflecting back sunlight
The driving cost for solar pv is the structure and the land, the panels are now so cheap (and getting cheaper) that the economic recommendation is to install 3x the generation capacity of the inverter. Sizing for hitting capacity on the darkest days basically.

Living in a draft proof, highly insulated home with mechanical air filtration and heat recovery, driving an EV that’s powered by the roof of your house doesn’t sound like any kind of worse life to me.

Abundant, locally generated electricity is a game changer. You can even extract drinking water from the air inside your house in all but the driest of locations.

Page 1 of 8Next →