chrka

6 ms·

1.
by chrka 1mo ago
They say they don't do that. But maybe I should be more skeptical.
2.
by chrka 1mo ago
That's exactly why my previous public GitHub repo is now private.
3.
by chrka 1mo ago
I've written something like this in C - including resulting assembler code for ARM and x86. https://easylang.online/blog/branchless
4.
by chrka 1mo ago
https://news.ycombinator.com/item?id=48035568
5.
by chrka 2mo ago
Exactly. Just like using LibGen is prohibited.
6.
by chrka 2mo ago
I also recently made an open-source project with 200 GitHub stars private. I never had a problem with others using it as the basis for their own projects. In fact, that happened, and I received credit for it. But LLMs just hoover up everyth
7.
by chrka 2mo ago
Therefore it is srand(1).
8.
by chrka 2mo ago
Both versions use the same input data. I also tried different random initial values and got essentially the same result. I didn't test hundreds of inputs, since that would have been mostly a waste of time in this case. The algorithm an
9.
by chrka 2mo ago
You're talking about the complexity of the Quicksort algorithm, whereas the article is about code generation. Both versions sort the same data using the same algorithm. Just a tiny change in the source code caused Clang to generate dif
10.
Your code is fast if you're lucky(tiki.li)
136 points by chrka 2mo ago|85 comments
11.
by chrka 2mo ago
Don't trust your compiler. Your code is only fast if you're lucky. https://tiki.li/blog/lucky_code.html
12.
Your code is fast – if you're lucky(tiki.li)
2 points by chrka 3mo ago|0 comments
13.
by chrka 3mo ago
Normally, quicksort works best on random data. But with 90% already sorted and 10% random, it actually becomes harder to pick a good pivot. Sometimes the pivot ends up too large, which creates very uneven splits. When that happens, the algo
14.
by chrka 3mo ago
As for your party trick: The performance drop in "blqs" occurred because heapsort was applied directly to a poorly partitioned input. Quicksort now gets a second chance in this case. With 10% random, 90% sorted, the performance dr
15.
by chrka 3mo ago
You will now see the directory listing. This website was actually created for my primary side project: a simplified programming language for beginners. I just added a blog folder there for other things as well.
16.
by chrka 3mo ago
Branchful only wins via ILP when data becomes good predictable. But since Quicksort partitioning aims for a 50/50 split, it operates in the worst possible zone for a branch predictor. That's why branchless wins here, as proven by
17.
by chrka 3mo ago
Author here. No, it's also called from the non_trivially_copyable branch (as a fallback). I'll fix that.
18.
Show HN: Faster than std:sort and pdqsort(easylang.online)
1 points by chrka 4mo ago|0 comments
19.
Show HN: Branchless Quicksort – faster than std:sort and pdqsort(easylang.online)
2 points by chrka 4mo ago|0 comments
20.
Show HN: Avoiding "if" makes Quicksort faster(easylang.online)
3 points by chrka 4mo ago|4 comments
21.
When 'if' slows you down, avoid it(easylang.online)
6 points by chrka 4mo ago|0 comments
22.
Show HN: A Fast Quicksort in C with Branch‑Avoidant Coding and Threads(easylang.online)
1 points by chrka 5mo ago|0 comments
23.
Show HN: Interactive demos of sorting algorithms with runtime comparisons(easylang.online)
1 points by chrka 5mo ago|0 comments
24.
Show HN: Interactive sorting algorithm visualizations with runtime comparisons(easylang.online)
1 points by chrka 5mo ago|0 comments
25.
Show HN: Law of Large Numbers or Why It's a Bad Idea to Go to a Casino(easylang.online)
3 points by chrka 9mo ago|1 comments
26.
by chrka 9mo ago
https://easylang.online/xmas.html
27.
Show HN: Programming a Christmas Tree(easylang.online)
2 points by chrka 9mo ago|0 comments
28.
Show HN: A short story of my programming language Easylang(easylang.online)
2 points by chrka 10mo ago|0 comments
29.
Analysis indicates that the universe’s expansion is not accelerating(ras.ac.uk)
261 points by chrka 10mo ago|208 comments
30.
Show HN: Strange Attractors – Visualized with Easylang(easylang.online)
3 points by chrka 11mo ago|0 comments

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