blattimwind

5 ms·

1.
by blattimwind 6y ago
x264 is kinda absurdly good at compressing screencasts, even a nearly lossless 1440p screencast will only have about 1 Mbit/s on average. The only artifacts I can see are due to 4:2:0 chroma subsampling (i.e. color bleed on single-pixe
2.
by blattimwind 6y ago
> I used a Satechi USB-C power tester and measured an 8% peak power savings using UASP. That means you'd get 8% more runtime on a battery if you do a lot of file transfers. No no, even better! Peak power consumption is lower, but th
3.
by blattimwind 6y ago
The late 1990s called and want their Numalink back.
4.
by blattimwind 6y ago
> DAB solves that minor issue at least. Enter Germany, where it was decided DAB is not a federal matter and basically you have 16 small states with entirely different stations available on DAB. The one real advantage DAB could have had,
5.
by blattimwind 6y ago
CRTs are "dumb" devices, they literally just amplify the R/G/B analog signal while deflecting a beam using electromagnets according to some timing signals. As far as input lag goes, they're the baseline. For fast mo
6.
by blattimwind 6y ago
> Animations and intentional delays. It can't be said, how much faster a machine feels when something like MenuShowDelay is decreased to 0, or the piles of animations are sped up. These animations effectively increase the input lag
7.
by blattimwind 6y ago
I disagree. What you describe is a problem of interaction design founded on bad assumptions; with good interaction design I don't have to show the user that the computer is doing something for the user to be able to tell it happened. T
8.
by blattimwind 6y ago
> In the case of bitcoin mining as far as I know GPU's passed the hat directly to ASIC's. I never heard that FPGA's were competitive for that. They were, before the ASICs came. CPU -> GPU -> FPGA -> ASIC. A classi
9.
by blattimwind 6y ago
From a modern point of view it's not a challenge. Historically voice encryption was politically only meant for state use, with strict controls, and us plebs not getting any voice encryption or very weak encryption only. Compared to enc
10.
by blattimwind 6y ago
Very clever to use the same pinout as the PCIe "flexible risers" that already use USB cables, so only the chip replacement is necessary.
11.
by blattimwind 6y ago
> Meanwhile, pointing at memory latency as the flaw in Ryzen has been a popular misdirection for a while now. How is it a misdirection? The data is accurate and memory latency scaling is a well-known issue for simulations like e.g. games
12.
by blattimwind 6y ago
IIRC L3 is slightly slower on Zen 2, main memory as mentioned much slower. Clock speed advantage -- Most Zen 2 CPUs don't overclock to 4.5 GHz on any core, let alone all-core. The boost numbers are reached with current firmware, but on
13.
by blattimwind 6y ago
As a desktop user, my CPU tends to be mostly idle. So overall power efficiency is impacted a lot by idle power consumption; my AMD Ryzen CPU alone draws significantly more power in idle than my previous several-years-old Intel system. In fa
14.
by blattimwind 6y ago
For what it's worth, Intel is still faster in most applications, simply by virtue of having a clock speed advantage that by far exceeds any IPC difference, and also by having much lower memory latencies. AMD has basically a 20-30 ns
15.
by blattimwind 6y ago
Which compiler that can compile modern C++ doesn't always inline a static single-caller function?
16.
by blattimwind 6y ago
Correct, a CMOS sensor with a rolling shutter looks and handles a lot like a piece of DRAM. Pixels are arranged in rows and colums; capturing a frame works just like a sequential read through a DRAM array. The nominal frame-rate at a given
17.
by blattimwind 6y ago
Autochrome is pretty much just subpixels. You capture and view a greyscale image through the same dots-of-color filter plate, and thus you see color, just like an image sensor uses a Bayer filter to deconstruct color into greyscale (with
18.
by blattimwind 6y ago
> Certain types of mechanical shutters exhibit the same phenomenon at high speeds. Pretty much all focal-plane shutters do it beyond 1/60 to 1/250 of a second (identical to the flash sync speed), because the finite movement spe
19.
by blattimwind 6y ago
> All I want is an Android between 5 inch and 6 inch, something the size of a 2016 iPhone SE. That's much larger than the SE (4" screen, 125x60x7.5 mm, 110 g compared to 5" screen, 140x70x7.5 mm, 150 g for the 2020 SE). Wh
20.
by blattimwind 6y ago
Sometimes I use a quad-core laptop with 2 GB of memory and no swap (because it doesn't have enough disk space for a meaningful amount of swap) and five tabs is practically a hard limit. Even with adblocking, news sites and sites like i
21.
by blattimwind 6y ago
I guess you upgraded the RAM to 8 GB? Because I don't see how the web is usable on a machine with 2 GB of RAM...
22.
by blattimwind 6y ago
> These design decisions all made sense when clock rates were exponentiating, but they're all nightmares now that we rely on branch prediction and memory prefetching and superscalar execution units. The codec is simply not a good fi
23.
by blattimwind 6y ago
The A64fx isn't that high TDP, if the reported number of ~160 W for the entire thing (including HBM) is accurate.
24.
by blattimwind 6y ago
There are some very small ones, too.
25.
by blattimwind 6y ago
Okay, but in that case you're not breaking the law if you sign in their name -- at least in some countries. So it'd be probably back to "just a ToS violation".
26.
by blattimwind 6y ago
Discrete logic is still around and new series have been introduced even relatively recently, for example single-gate ICs the size of a single transistor, for when you "really just need that one NAND" on the board.
27.
by blattimwind 6y ago
> (More cores aren't a performance improvement; if you were willing to deal with non-serial execution, you could have just bought 32 Pentium Fours; putting them all on the same chip is convenient (and cheap), but as a price/per
28.
by blattimwind 6y ago
ISA doesn't matter nearly as much as people think, unless it's something really different (like VLIW/EPIC/...).
29.
by blattimwind 6y ago
The msgpack parser handles strings zero copy as well. Some tiny JSON parsers for embedded stuff do that as well.
30.
by blattimwind 6y ago
> Using someone else's card without a signature would just be a breach of the T&C's, but not a crime. Even without forging a signature, it would still constitute theft or fraud, no?

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