jnordwick

12 ms·

91.
by jnordwick 3y ago
I've written 2 in C++ for different projects at companies State Farm and State of Decay. I'm trying to write one that kind of inverts things and calling it Enemy of the State. But yes, his name pisses me off because I didnt think
92.
by jnordwick 3y ago
arthur whitney's famous first J interpreter. https://www.jsoftware.com/ioj/iojATW.htm The first version of KDB the timeseries database was written by arthur in C to bootstrap the K interpreter that was used to wri
93.
by jnordwick 4y ago
does xchg count
94.
by jnordwick 4y ago
Rust's new claim is now that references isn't immutable, it's shared by default. There is no concept of immutable data in rust. All data is mutable in various ways and that is a product of the binding not the data, from the c
95.
by jnordwick 4y ago
too many misconceptions around rates where we have had definitive theoretical and empiracle data otherwise: - the govt doesnt set bank to bank overnight rates, it only has targets. and in the past it has been only partially successful at ke
96.
by jnordwick 4y ago
wtf? > Clearly it’s equivalent to Choice’s use of a boolean tag. Isn’t it remarkable that algebraic manipulations agree with our intuition? no, thats not interestimg at all. It is literally just encoding left/right in a bool. that p
97.
by jnordwick 4y ago
https://code.kx.com/q/basics/enumerations/ i miss k
98.
by jnordwick 4y ago
Wihtout seeing the assembly it is difficult to say but for such a large difference, the culprit often seems to the loop iop cache. If you check the alignment of the top of the loop instructions (and it inlined away the calls) sometimes you
99.
by jnordwick 4y ago
Maybe 10 years ago that as the common things, but there are so many exta resources (esp registers) that is is now giving up almost half the chip. If you can be cache friendly enough, the extra cycles will make up for it.
100.
by jnordwick 4y ago
Google's product naming. Ever tried to search for Google Assistant, Home, Auto, Sheets, etc...? You would think Google of all places would be very aware of useful it is to be searchable.
101.
by jnordwick 4y ago
> through io_uring instead of having to use different async options or threadpools for everything io_uring is a threadpool, and to get performance above epoll, it probably needs to expose the pools and the scheduling choices. eBPF for sc
102.
by jnordwick 4y ago
lookup zero knowledge proofs, I believe that is what he is referring to as the better way
103.
by jnordwick 4y ago
> In summary: by moving from maps to arrays. That may seem like an awfully pedestrian observation, but it certainly wasn’t obvious to us at the outset that this was the crux of the problem! How is this not your first thought !?!? Why wo
104.
by jnordwick 4y ago
I'm confused. Are you supposed to look at the article and have a discussion on bad it is and how the Takeaway doesn't match the rest of the article. or more likely... who on HN staff is now being paid to shill snake oil? Maybe we
105.
by jnordwick 4y ago
I think the disconnect often comes from various adjustments made for things like seasonality or yearly tracking changes. While the SA numbers showed a large, removing the seasonal adjustment showed a 79k increase in the raw numbers.. This i
106.
by jnordwick 4y ago
"Linux would join Microsoft, Amazon, and Facebook in usage of Rust as a disciplinary tool."
107.
by jnordwick 4y ago
KDB+ has always supported SQL92 I thought (minus the DDL stuff). I've seen and edited Arthur's files (and blind now). Much of '99 was there too when k had those alternate syntax libraries just translated down to k (may still
108.
by jnordwick 4y ago
> It not right to say it’s irrelevant, it is, but the most important thing is what the market is willing to pay That's what he's saying, just he's a step ahead of you. Why is the market willing to pay that much? Because th
109.
by jnordwick 4y ago
> Rust deniers Wow.
110.
by jnordwick 4y ago
> Rust does have a hard time explaining very, very low level stuff A little odd for a supposed system langauge
111.
by jnordwick 4y ago
But it takes a lookup hit and you need an arena per object type with its memory overheard. You'll get more cache misses. A lot of the rust performance talking points just aren't true. Rust is slower than C and C++, not by much but
112.
by jnordwick 4y ago
Refiners can be adapted to process more sour blends when a longer term issue is seen or it can be routed through a 3rd party who can supply the service. If that wasn't the case you wouldn't see contracts for off grades just writte
113.
by jnordwick 4y ago
That doesn't work in a global market. Never has. It merely shuffles who sells to who an who starts holding . Give that it could actually drive the price higher domestically and abroad and invite retaliatory actions, this is a Great Dep
114.
by jnordwick 4y ago
> which is indeed 3-5 cycles depending to the specific microarchitecture I assume you are talking about from fetch to hitting the store buffer? That would be the aabsolute min time before the data could be seen elsehwere I would think. I
115.
by jnordwick 4y ago
worked as a quant, dev, and trader. there is no objective way to even prove it in the future, let alone now. It isn't in the realm of science.
116.
by jnordwick 4y ago
The concept of speculation run rampant that then everybody sees the truth and runs hard the other way in the marketplace is a myth. The idea that the best weighing machine ever devised is so far off for so long and then just magically turns
117.
by jnordwick 4y ago
Nobody has had negative interest rates without policy prescriptions that may show up as a negative rate, but on balance sheets do have costs. 1. There have been negative yields for short periods of time, but a yield isn't the same thin
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by jnordwick 4y ago
It was a picture book of donuts.
119.
by jnordwick 4y ago
Gold isn't valued by its industrial uses. That's why gold is good as a currency, precisely because it has very limit use. With actual use comes demand based on that use, and that demand causes swings in value - what you don't
120.
by jnordwick 4y ago
Sorry, I dropped all the 1s in that message when i typed it (laptop keyboard is a little sketchy right now). That should have been 15 and 18. I think the recent Intel microarchs take 14 plus howewever long at uopd decoding that minimum 1, s

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