MYmyst·Feb 12, 2025Submission
2 points · Open discussionapankrat
notes
C2020–2025
apankrat / notes
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4Distinct people
6Mentions
0Explicit recommenders
83GitHub stars
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 12:54:37 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year6 dated mentions
Observed mentions: 2020-11-22 16:27:44 UTC to 2025-02-12 16:54:48 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 3 | 3 | 0 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 1 | 0 |
What Hacker News says
6 sourcesLooking for interesting performance engineering examples for class
I'm teaching a performance engineering class at UC Davis (EEC 289Q) that's based on the amazing 6.172 performance engineering class from MIT. While many instructors have taught this class, Charles Leiserson has been the principal instructor for many years, and it's been a pleasure working with him and his colleagues in bringing it to UC Davis.
Much of the class has been a little more abstract, high-level, academic and I'd like to give a lecture that has several interesting practical examples that underscore some of the ideas that were taught in class. I've gathered a number of links from Hacker News over the past few months that are possible examples of what I'd love to hear (see below). The hope is that you might be able to suggest material or links that are along the lines of an in-depth blog post, hopefully with some interesting quanti
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tative results, that basically tells a story like "I had this performance problem; it wasn't obvious that the answer to the problem was X, but I did some digging and it turns out it was X and I addressed it by Y." Ideally, X would be related to a topic we discussed in the class, which included:
General C-level performance optimizations / bit hacks / LLVM IR / compiler optimizations / races and parallelism / anything having to do with Cilk, which we studied in depth / parallel algorithms / storage allocation / cache {efficient, oblivious} algorithms / synchronization
Here's some of the links I collected from Hacker News that I thought might be suitable for ~10-15 minutes each:
https://hackernoon.com/timsort-the-fastest-sorting-algorithm-youve-never-heard-of-…
https://github.com/apankrat/notes/tree/master/fast-case-conversion
https://github.com/madler/crcany
https://dlang.org/blog/2020/05/14/lomutos-comeback/
https://aqjune.github.io/posts/2021-10-4.the-select-story.html
https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times-by-70/
I'd be much obliged for any suggestions you might have!
Fast character case conversion (or how to compress sparse arrays)
70 points · Open discussionFast character case conversion, or how to really compress sparse arrays
80 points · Open discussionNice, very nice. All of it. Long live C.
Being stuck with C++ I did something in reverse - ported C-style ("intrusive") containers to ++, making them a bit safer to use, but keeping the syntax nearly the same.
https://github.com/apankrat/notes/tree/master/intrusive-cont...
In C Template LibraryC-style intrusive containers in C++
2 points · Open discussion