Hacker News: wmu

New comment by wmu in "Accelerated SQL for JSON with AVX512 (Golang)"

wmu — Tue, 17 May 2022 14:39:56 +0000

Disclaimer: I'm one of the authors of sneller core. We have been working on this project for more than a year. It's has got neat AVX512-centered architecture and many neat tricks inside.

Accelerated SQL for JSON with AVX512 (Golang)

wmu — Tue, 17 May 2022 14:37:09 +0000

Article URL: https://github.com/SnellerInc/sneller

Comments URL: https://news.ycombinator.com/item?id=31411330

Points: 19

# Comments: 9

New comment by wmu in "Yes Hello"

wmu — Thu, 20 Jan 2022 20:57:48 +0000

There are many scary things in the world. But the scariest is the line "Hi, I have a quick question". :)

New comment by wmu in "“Fast Kernel Headers” Tree -v1: Eliminate the Linux Kernel's “Dependency Hell”"

wmu — Mon, 03 Jan 2022 12:27:34 +0000

It was already said by the author, that approx ~70% of patches can be applied independently in various part of the source tree. The rest has to be synchronised.

New comment by wmu in "Google no longer producing high quality search results in significant categories"

wmu — Sun, 02 Jan 2022 20:10:27 +0000

DuckDuckGo is also not good. Last week I switched to Bing and its results are surprisingly good.

New comment by wmu in "You can't copy code with memcpy"

wmu — Wed, 29 Dec 2021 23:27:42 +0000

- It looks like a virus... - But it's the antivirus!

New comment by wmu in "Bit Test and Reset vs. Compilers"

wmu — Fri, 24 Dec 2021 14:00:11 +0000

Thanks, that's a really elegant approach.

New comment by wmu in "Bit Test and Reset vs. Compilers"

wmu — Thu, 23 Dec 2021 23:45:48 +0000

Author here. I cannot use BSR, because have to execute code for all bits, regardless their value. The range is: the last bit to the first with value 1. It's a non-obvious iteration schema. :)

New comment by wmu in "English has been my pain for 15 years (2013)"

wmu — Wed, 22 Dec 2021 12:03:53 +0000

> In continental Europe I have often been in a room with people from 10 different countries say Germany, France, Italy, Russia, Poland, India, China, Korea, England. Everyone could understand each other's broken English with the exception that half of the people couldn't understand English guy.

The problem is that most people are not exposed to real-life English. It's either quite artificial language during classes or well spoken lines in movies. Words are spoken slower and clearer. Native speakers speak fast, use linking, colloquial language, multitude of idioms, phrasal verbs, and tons of stuff never ever touched during classes.

New comment by wmu in "Ask HN: How do you track your billable working hours?"

wmu — Wed, 25 Aug 2021 19:31:43 +0000

I use my own, simple CLI tool* (not only to track working hours, but also to track open source or hobby activiets). For many years I used Toggl, which is great and powerful - I just needed something that works offline.

[*] https://github.com/WojciechMula/timetracker

New comment by wmu in "Programming Idioms"

wmu — Sun, 15 Aug 2021 20:40:45 +0000

There's a similar project http://rosettacode.org/wiki/Rosetta_Code.

New comment by wmu in "Three Fundamental Flaws of SIMD"

wmu — Tue, 10 Aug 2021 20:07:15 +0000

We can call these things "flaws" or "traits", it doesn't really matter. The reality is SIMD hardware is ubiquitous, while the alternatives the article mentions are niche. Maybe except ARM SVE, which appeared this year on the market.

New comment by wmu in "Artist faked being a billionaire to photograph New York City’s best views"

wmu — Thu, 29 Apr 2021 09:53:05 +0000

Love the whole project, she's my hero. :) I'm wondering how much did she pay in total to look like a billionaire.

New comment by wmu in "C++ Alternative Operator Representations"

wmu — Fri, 23 Apr 2021 18:23:50 +0000

I often use "not", "and", "or" to clearly express logical conditions. Bit operations look better as cryptic symbols "&", "|" and "~". :)

New comment by wmu in "IBM employee forced to stop kernel work under personal email address"

wmu — Tue, 20 Apr 2021 05:51:08 +0000

The sentence in question is misinterpreted. I read it like this: our contract applies all the time, not only when you're directly working for the company. We don't know what the contract exactly says. Likely there's an agreement not to work on IBM-related products in spare time.

New comment by wmu in "Show HN: I wrote a book about Go"

wmu — Wed, 24 Mar 2021 17:00:53 +0000

Looks great! Seems there were some issues in conversion into HTML chapter titles. For example https://www.practical-go-lessons.com/chap-31-logging#log.fat...

New comment by wmu in "Performance comparison: counting words in Python, Go, C++, C, Awk, Forth, Rust"

wmu — Mon, 15 Mar 2021 12:39:44 +0000

Regarding the C++ version: instead of copying data to a vector and then sorting the vector, it might be more profitable to use std::multimap. This is a sorted container (likely rb-tree based) that handles duplicated keys.

Also, as somebody else mentioned, iostreams are slow. Even simple reading of file can be several times slower than plain C (http://0x80.pl/notesen/2019-01-07-cpp-read-file.html).

New comment by wmu in ".DS_Store"

wmu — Fri, 12 Mar 2021 21:18:50 +0000

The article mentions that the format was reverse-engineered, but the link goes to some extension database page, without any further details. Is the format really known?

New comment by wmu in "Zluda: CUDA on Intel GPUs"

wmu — Sat, 27 Feb 2021 15:43:10 +0000

Trivia: the Polish word "cuda" means "miracles", "zluda" ("złuda") means "a delusion". Nice pun.

New comment by wmu in "Create diagrams with code using Graphviz"

wmu — Wed, 10 Jun 2020 19:05:07 +0000

Really nice, well written introduction. Graphviz is a cool tool, we used this when debugging some graph-related algorithms.