HNHacker News
TopNewBestAskShowJobs

gpapilion

1,086 karma · joined December 21, 2010

submissionscomments
gpapilion··on Nuclear-fusion lab achieves ‘ignition’: what does it mean?
I reckon solar is competitive in the day time without storage or peaker plants to support low generation time. I’d love to see the analysis of solar with the built in assumption of burdening the hourly cost with the infrastructure required to generate the required power at 10pm.
gpapilion··on Musk orders Twitter to cut infrastructure costs by $1B – sources
Twitter is mostly on their own infra. 1 billion is 25% of total revenue. I think they are close to that spend with cloud but it’s more like 750m if I were to venture a guess.
gpapilion··on The cumulative advantage of a unionized career for lifetime earnings
I tend to think it has just gone into retirement income for private sector. For example a typical teacher may have a pension wort 2 million dollars at age 65, where a private sector worker would be expected to see that by contributing to their 401k. The value of the pension will vary based on length of life.

It would be extremely difficult to contribute enough money to a 401k, since it’s basically a lifetimes earning for someone making 80k a year.

gpapilion··on You Hated Your Cable Package. Your Streaming Services Are Bringing It Back
When I look at this article all I can think is that the cost of cable internet was too high when bundled with tv.
gpapilion··on Apple Has Reportedly Rejected TSMC's Chip Price Hike of 6%
My thought is margin is low on apple but volume is high. They also are a good partner helping to push the process forward. AMD and NVIDIA are probably more profitable than apple for tsmc but volumes are much lower.

I also think the ability to improve tier prices as fast as they have is directly related to apple’s volumes.

gpapilion··on How mechanics keep 50-year-old BART trains running: Windows 98, eBay, and scraps
I always heard it was an attempt to keep anyone using the rail for carrying cargo or other comercial traffic. They had concerns folks would sabotage their growth in order to resell the lines later.
gpapilion··on Credit Karma fined $3M by FTC for misleading consumers with credit card offers
Credit Karma provided intuit with $475m in revenue for its Q4’22 earnings. Inuit posted a loss but I suspect credit karma was break even or slightly profitable.

https://s23.q4cdn.com/935127502/files/doc_financials/2022/q4...

gpapilion··on After self-hosting my email for twenty-three years I have thrown in the towel
I actually would rephrase it as there weren’t enough users with money to make using email a worthwhile scam medium.

Email is low trust and almost any user is susceptible to being scammed, because there aren’t good trust markers in emails, and companies use it in ways that make it indistinguishable from spam.

gpapilion··on A near 100% renewables grid is well within reach, and with little storage
I’m assuming you live in an old house with 100amp or below service. Doesn’t this apply to adding any high current appliances as well?
gpapilion··on Car Seats as Contraception (2020)
I’ve thought about this a lot when it comes to car seats. The paper implies 57 deaths prevented, but I see these stats often turned to a percentage reduction(53% reduction in deaths for example). Then when debated the change in the death as a percentage seems large, and folks automatically vote for these laws. We continue to chase small improvements because we aren’t looking at the actual numbers.
gpapilion··on Our BMCs are not great at keeping accurate time
The oem vendors have been adding weird surcharges for the bmcs to use features. For example hp used to charge(and I assume still does) for remote console. The author mention dell charged for using ntp, which was a little surprising. But, “enterprise” features like ntp and ldap are things vendors get excited to charge you for.
gpapilion··on Our BMCs are not great at keeping accurate time
It is.

The industry has really build around 2 vendors for chips, and two vendors for software solutions for those chips, AMI and Insyde. These systems are generally pretty locked dow , but there are was to get to the Linux core(sometimes serial headers).

gpapilion··on Shimano 105 Di2: Delivers 12-Speed Shifting, Wireless Performance to More Riders
These are justified when looking at the truly elite level. You’re looking for fractional improvements that might add up to a watt or two. Aero frames, internal cables, spandex, are all about things that will make a marginal difference at an elite level.

Disc brakes have been a bit of an outlier with extra weight and safety issues brought up by riders. Though it’s easier to internally route cables, and you can stop quicker and more predictably. Maybe the aerodynamic issues of the cables are big enough to switch for the elite riders.

gpapilion··on How an engineer looks at the idea of pumping water from Mississippi to the West
California was terraformed to support logging and mining operations. Now it supports agriculture with a much smaller percentage supporting cities.
gpapilion··on TinyPilot: KVM over IP Control any computer remotely
I’ve never quite understood the advantage of this over a server bmc(unless it’s not server hardware).
gpapilion··on The Great Green Wall
One reason cited for lack of new sequoia growth in the Sierra Nevada is introduction of sheep towards the later period of Spanish colonization, and continued through early 1900s with the US taking over.
gpapilion··on Why your next home computer should be an old Xeon workstation (2019)
A typical server tdp will vary a lot depending on the components buts it’s a safe bet to look at 1u being right around 1000w for a recent Xeon.

It’s also the opposite older equipment for servers. There are lower tdps for older equipment and for a haswell or broadwell it may use 20-30% less energy than a typical server sku. The compute per watt has increased, but the power draw of modern server cpus are probably much higher than you would expect.

gpapilion··on Three Arrows Capital reportedly facing insolvency
Also LTCM had something like 1 trillion dollars in swaps. It put the entire world economy at risk.
gpapilion··on Why Is AVX 512 Useful for RPCS3?
I agree however adoption of these instructions have been very slow. The additional real estate needed for these probably seemed less worthwhile when there is little to no consumer demand.
gpapilion··on I Rented an Electric Car for 4 Days and Spent More Time Charging Than Sleeping
Around 500 miles; basically Sf to la. That trip is 2.5-3 hours by plane in the best case, and can tick up to 5-6 easily. You also have to figure in rental car etc.

That said I’ve spent 10+ hours going from sf to la in a car.

gpapilion··on DDR5 RAM prices crashed by 20% in May
Very few workloads are memory bandwidth bound. For workloads that are yes. You’ll get bigger gains by using all the memory channels and engaging all the memory controllers vs upping the clock.
gpapilion··on California Drought Update May 2022 [pdf]
I would venture most toilets in California are 1.6 gallons per flush or less. In 2014 it moved to 1.28 gpf. The replacement cycle has probably caught the majority, but you never know.

Drought tolerant landscaping took off in the 1990s, and you still see plenty of it. Lawns represent a real issue, but municipalities still force users to water at night, sometimes particular days to reduce usage.

The real issue is agriculture usage and high usage crops(almonds and alfalfa) which are often exported. These users get absurd discounts compared to residential usage (in the 90s there was moaning when prices went to 32 dollars an acre foot, or 325k gallons currently it’s ~$70).

gpapilion··on iPad Air 2 running Linux 5.18
No input mechanism from the thread, but maybe soon.
gpapilion··on Elon Musk Tesla email: Remote work is no longer acceptable
I believe this is directing his staff to bring all the employees back. The exceptional individual part is him saying if they are a really good ic I’ll consider it.
gpapilion··on Ask HN: Why does my '15 MacBook Air have the same RAM (8gb) as a '22 McBook Pro?
Because it’s cheaper that way. It’s generally the second most expensive component in the system.

Compression for memory on macs has probably removed a lot of this pressure to increase beyond 16gb.

For the arm solutions moving the memory on package also may be a limiting factor, since there is only so much space available.

Lastly since macs have memory fixed to the package or motherboard failure is expensive, since you’re replacing an entire system board. They have about a 1.5% afr.

gpapilion··on Sorry, but for You, Oil Trades at $250 a Barrel
https://archive.ph/4j39Q
gpapilion··on Accelerated SQL for JSON with AVX512 (Golang)
Am I missing the comparison of avx ve non-avx performance?
gpapilion··on Twitter loses three more senior employees ahead of Elon Musk takeover
https://archive.ph/SbHLJ
gpapilion··on Investors pull $7bn from Tether as stablecoin jitters intensify
https://archive.ph/3IqB5
gpapilion··on Carvana laid off 2,500 employees today via a pre-recorded message through zoom
I sold a car to them the other day that was 10 years old for 18k.

I dont think inventory is their issue, but rather the fact they are a lender more than a dealer. They just make a lot of questionable loans and repackage them for sale, sort of.

← PreviousPage 4 of 13Next →