Hacker News: mrcode007

New comment by mrcode007 in "Austin’s surge of new housing construction drove down rents"

mrcode007 — Thu, 19 Mar 2026 02:30:48 +0000

This 1000x. Folks don’t get that the primary market != secondary market. Same as pre-IPO stock holder != IPO time buyer.

New comment by mrcode007 in "Wind power slashed 4.6B euros off electricity bills in Spain last year"

mrcode007 — Wed, 14 Jan 2026 21:51:03 +0000

Solar prevents sun from hitting the ground causing death of the plants preventing photosynthesis and suffocating life on earth. Did I get it right?

New comment by mrcode007 in "US will ban Wall Street investors from buying single-family homes"

mrcode007 — Wed, 07 Jan 2026 23:36:10 +0000

It’s not gobbledygook. I think for most people it’s hard to grasp the scale of the entire industries outside of their area of professional expertise so you can look at some numbers here:

https://www.milliman.com/en/insight/mortgage-market-and-hous...

https://www.sifma.org/issues/market-structure/housing-financ...

New comment by mrcode007 in "I've been writing ring buffers wrong all these years (2016)"

mrcode007 — Sat, 20 Dec 2025 01:34:48 +0000

In fact this a crux of the problem in low latency code and there are ways to combat this.

I know there is an academic wait-free and lock-free definition but folks use those often incorrectly as a slogan that something is magically better because it’s „lockfree”.

Imagine how _you_ would implement a read-modify-write atomic in the CPU and why E stands for exclusive (sort of like exclusive in a mutex)

New comment by mrcode007 in "I've been writing ring buffers wrong all these years (2016)"

mrcode007 — Sat, 20 Dec 2025 01:26:09 +0000

Yes. [1] has background, [2] has the implementation (fig 2. pseudocode). Since you understood my comment I trust you can figure out the rest :) it’s a very neat trick.

[1]https://www.microsoft.com/en-us/research/publication/concurr... [2]https://arxiv.org/pdf/1012.1824

New comment by mrcode007 in "I've been writing ring buffers wrong all these years (2016)"

mrcode007 — Thu, 18 Dec 2025 21:30:02 +0000

There is one more way that is truly lock free. Most lock free implementations relying on atomic compare and swap instructions are not lock free afaik; they have a lock on the cache line in the CPU (in a way you go away from global lock to many distributed locks).

There is one more mechanism that allows implementing ring buffers without having to compare head and tail buffers at all (and doesn’t rely on counters or empty/full flags etc) that piggybacks on the cache consistency protocol

New comment by mrcode007 in "Australia begins enforcing world-first teen social media ban"

mrcode007 — Thu, 11 Dec 2025 02:40:36 +0000

Imagine having to show your ID demonstrating you’re not subject to the law punishing you for driving a car without a driving license.

New comment by mrcode007 in "io_uring is faster than mmap"

mrcode007 — Fri, 05 Sep 2025 05:24:53 +0000

happens frequently in fact when training neural nets on modern hw

New comment by mrcode007 in "IRS head says free Direct File tax service is 'gone'"

mrcode007 — Fri, 01 Aug 2025 15:06:22 +0000

The workaround is for everyone to coordinate , print and mail physical returns. Let IRS have fun with scanning and processing :) enough people do this, IRS would open up digital filing again

New comment by mrcode007 in "Lisp project of the day"

mrcode007 — Fri, 25 Jul 2025 14:55:20 +0000

(format t "x = ~6d~%y = ~.8E~%" x y)

New comment by mrcode007 in "Jane Street barred from Indian markets as regulator freezes $566M"

mrcode007 — Sun, 06 Jul 2025 22:39:36 +0000

it’s a known effect. Without going into details here, you can calculate first crossing time of a barrier in a stochastic process and observe that often the first crossing time decreases as the volatility increases. From there you can set one barrier at 0 (default) and draw your own conclusion.

New comment by mrcode007 in "Analytic Combinatorics – A Worked Example"

mrcode007 — Tue, 08 Apr 2025 20:52:31 +0000

Thanks!

New comment by mrcode007 in "Trump is making Europe great again"

mrcode007 — Tue, 01 Apr 2025 01:03:50 +0000

Planes, finance, military equipment, video games, pharmaceuticals (ever heard of ozempic?)

New comment by mrcode007 in "Trump is making Europe great again"

mrcode007 — Tue, 01 Apr 2025 01:02:47 +0000

You’re forgetting prime brokers financing most of the US financial players on wall street Societe generale BNP paribas UBS+Credit Suisse Deutsche bank

Lets also not forget Ubisoft (French company) making assassins creed etc games

And airbus making planes ?

New comment by mrcode007 in "Trump is making Europe great again"

mrcode007 — Mon, 31 Mar 2025 23:29:13 +0000

I think you’re basically wrong?

https://en.wikipedia.org/wiki/List_of_largest_companies_in_E...

New comment by mrcode007 in "White House Says Gold Reserves May Be Used to Purchase Bitcoin"

mrcode007 — Tue, 25 Mar 2025 04:54:23 +0000

Yep. It’s a classic grift; it even has a name „control fraud”…

Described in depth in „lying for money”

New comment by mrcode007 in "White House Says Gold Reserves May Be Used to Purchase Bitcoin"

mrcode007 — Tue, 25 Mar 2025 04:22:31 +0000

Now we know that it is indeed possible to rob Fort Knox ! Brilliant plan.

New comment by mrcode007 in "Mice perform 'first aid' to revive their stricken companions"

mrcode007 — Mon, 10 Mar 2025 02:00:17 +0000

I think it’s a different paper?

An innate drive to save a life https://www.science.org/doi/10.1126/science.adv3731?url_ver=...

Mice perform 'first aid' to revive their stricken companions

mrcode007 — Mon, 10 Mar 2025 01:40:28 +0000

Article URL: https://www.thetimes.com/uk/science/article/mice-perform-first-aid-to-revive-their-stricken-companions-zqh8z38kf

Comments URL: https://news.ycombinator.com/item?id=43316069

Points: 13

# Comments: 6

New comment by mrcode007 in "Tesla sales crash continues in Europe, with Germany down 70%"

mrcode007 — Wed, 05 Mar 2025 23:15:45 +0000

first, folks need to exit/reduce their positions stealthily without disrupting the market. this takes time; for big positions it is not unusual to be exiting it for more than 6 months