RERetr0id·Mar 1, 2026
This repo's readme gives a great overview of the previous-best approaches (as of ~6 years ago): https://github.com/komrad36/CRC
In Chorba: A novel CRC32 implementation (2024)komrad36
CRC
C++2021–2026
komrad36 / CRC
CRC
Fastest CRC32 for x86, Intel and AMD, + comprehensive derivation and discussion of various approaches
5Distinct people
6Mentions
0Explicit recommenders
353GitHub stars
What to know before exploring
What it is
Fastest CRC32 for x86, Intel and AMD, + comprehensive derivation and discussion of various approaches
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
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Also in these discussions
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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, 3:56:07 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: 2021-12-01 16:40:38 UTC to 2026-03-01 21:37:03 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
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 |
|---|---|---|---|---|---|
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 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 | 2 | 0 | 2 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
6 sourcesFor those that thought the process of speeding up CRC was interesting, I strongly recommend reading [1]. It describes a step by step process on how a naive CRC implementation might be improved, until finally arriving at an implementation in assembly with a staggering throughput of 62 processed bits (almost 8 bytes) per CPU cycle. Yes, you read that right.
[1]: https://github.com/komrad36/CRC
In Making CRC calculations in Mojo 18x faster than Python and 3x slower than PythonThat is weird. Seems like crc optimization is quite a rabbit hole.
https://github.com/komrad36/CRC has a massive section about it in the README. Really interesting.
In How Postgres stores data on disk – this one's a page turnerhttps://github.com/komrad36/CRC
I measured it on my computer to run at 32GB/s, i7 4770k.
In Faster CRC32 on the Apple M1Creels on youtube is a good start if you're interested in that sort of thing.
Also, this will amaze you: https://github.com/komrad36/CRC
Knowing details about your system can give you 60x speedup over naive implementations. That CRC32 (Castagnoli) checksum is also 29x faster than the best you can do in WebAssembly, for example.
In Ask HN: Where can I learn about programming SIMD and branchless programming?