fpoling

10 ms·

181.
by fpoling 1y ago
If quantum computing would progress just like in the last 30 years it may take 300 years before it can be useful. https://eprint.iacr.org/2025/1237.pdf
182.
by fpoling 1y ago
Quantum mechanics with its non-copy property implies that a true black box can be created.
183.
by fpoling 1y ago
The best batteries have like 40 times less energy density than engines running on oil derivatives. Even considering that electrical engines are 90% efficient while combustion engines get like 25% efficiency, that still leaves the factor of
184.
by fpoling 1y ago
Does this JBOD consist of SSD? HDDs in that amount can be rather noisy.
185.
by fpoling 1y ago
Extracting keys from a modern SIM card is very difficult. The cost is way above 10K USD. So a payment card in offline mode is absolutely possible as long as one limits the payments to few hundreds USD. The bigger challenge is an offline te
186.
by fpoling 1y ago
Long term if people would really like to do something with CO2 emissions then CO2 captured from atmosphere can be used for chemical processes instead of coal/oil.
187.
by fpoling 1y ago
Anything that needs oil can be produced from coal. There are estimates that liquid fuel produced from coal can compete with oil when oil cost is 80-100 USD/barrel. The catch is that making coal liquid requires a lot of energy. If that
188.
by fpoling 1y ago
Europe has plenty of coal that can be used as a good backup for renewable energy production.
189.
by fpoling 1y ago
It is interesting that Ethiopia effectively banned import of new gasoline cars. Gasoline is heavily subsidized there and the government decided that forcing transition to electrical cars is a good way to eventually get rid of the subsidies.
190.
by fpoling 1y ago
Rust is very forgiving if the goal is not the absolutely best performance. One can rewrite Python code into Rust mostly automatically and the end result is not bad. Recent LLMs can do it without complex prompting. The only problem is the co
191.
by fpoling 1y ago
As Rust Zig has type-safe enums/sum types. That alone eliminates a lot of problems with C. Plus sane error handling with good defaults that are better than Rust also contributes to code with less bugs. Surely there is no borrow checker
192.
by fpoling 1y ago
The dataset is internal, but if you get a bunch of web pages from wikipedia and wrap them into HTML then it give a rough idea. With 4K LUKS sectors the write speed is too low for a modern SSD. Check that LUKS use a fast implementation. I h
193.
by fpoling 1y ago
Does this mean that the hibernated image must be signed each time the laptop hibernates?
194.
by fpoling 1y ago
And it is easy for a thief to see that a bag is heavy and slim to judge that it contains something valuable. Anf then the thief can just forcefully take the bag from you. In Barcelona there are a lot of cases when a thieve on a motorbike wo
195.
by fpoling 1y ago
GNU core utils are single-threaded. Rust allows safely to use several threads without much efforts. That alone will speed up utilities even if they are IO-bounded. Finally one could stop running double tar instead of cp -a on a huge tree to
196.
by fpoling 1y ago
Does the system use a boot loader? Or does it boot directly into kernel bypassing bootloaders?
197.
by fpoling 1y ago
I really do not understand why hibernate under secure boot is not implemented on Linux and this continues for years. It is as if the features are implemented by completely different people. But this is not obviously the case since systemd s
198.
by fpoling 1y ago
What is random.bin? I was testing with a json dataset that compresses by factor like 2.5 with zram. But if random is incompressible, then zram does not write compressed data but rather the original resulting in much faster read speed. Also
199.
by fpoling 1y ago
EDIT: while its true that on purely random 4K SSD performance degrades badly, with 32K random read/writes it is still above 2 GB/s so in practice it is LUKS that is the bottleneck, not SSD.
200.
by fpoling 1y ago
> are measuring sequential throughput On SSD I am measuring LUKS performance in fact as IO is much faster then LUKS encryption using specialized CPU instructions. As I wrote, without LUKS the numbers at least twice faster even with rando
201.
by fpoling 1y ago
On my laptop with Samsung PRO 990 SSD and Intel Core Ultra 7 165U CPU with 64G RAM under Debian 13: Read test via coping to RAM memory from LUKS-encrypted BTRFS against /tmp that is a standard RAM disk: $ dd of=/tmp/input
202.
by fpoling 1y ago
The article has not mentioned memory compression as an alternative to swap which many Linux distributions enable by default. On the other hand these days latest SSD are way faster than memory compression even with LUKS encryption on and eve
203.
by fpoling 1y ago
I have 3-port UGreen. It is either 60 to one port or 40-20 to two or something like 40-5-15 to 3.
204.
by fpoling 1y ago
The article mentioned that with the cross installed Sagrada will become the tallest building in Barcelona. But this is only from the ground. Barcelona is surrounded by high hills that are quite higher than Sagrada and there are a lot of bui
205.
by fpoling 1y ago
China has started in recent years to increase production of liquid fuels from coal (essentially what Germans did in WWII but much improved). That competes with oil when prices are above 80. With that it makes no sense for them to even try s
206.
by fpoling 1y ago
The original project for Sagrada included huge staircase from the sea side. The city hall in discussion if they should build that. The problem is that they need to remove a lot of buildings on that side and people living there are not happy
207.
by fpoling 1y ago
We almost missed Louvre on a recent visit to Paris. You need to book online and depending on the season weeks in advance.
208.
by fpoling 1y ago
This has the same purpose as caffeinate command on Mac and will prevent the system from suspend while a command is running. This is useful with tmux or long compilations or tests or whatever. On Linux I rather prefer to configure my laptop
209.
by fpoling 1y ago
In 1996 it was a subprocess. Linux Threads appeared only later that year.
210.
by fpoling 1y ago
Chromium recommends to use flat_map, a map-like interface based on a sorted array, for data structures facing GUI or similar when the number of items in the map is naturally bounded. It is faster and more compact compared with hash maps.

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