Hacker News: Yomguithereal

New comment by Yomguithereal in "ASCII Art Data Visualization in the Terminal like it's still 1970"

Yomguithereal — Sun, 28 Jun 2026 14:17:33 +0000

I would not call this ASCII art per se. Some of the used characters are not ASCII. How about Unicode art?

Data Visualization from the Comfort of Your Terminal

Yomguithereal — Wed, 17 Jun 2026 15:59:32 +0000

Article URL: https://github.com/medialab/xan/blob/master/docs/cookbook/dataviz.md

Comments URL: https://news.ycombinator.com/item?id=48572320

Points: 9

# Comments: 0

New comment by Yomguithereal in "New technique to easily partition CSV files for parallel processing"

Yomguithereal — Wed, 25 Feb 2026 17:04:12 +0000

> ‘Safely’. An attacker who has control over a row in that file can easily embed data that satisfies the statistical checks, thus injecting data.

This is clearly not the sort of thing you should expose to anyone, it is an optimization technique. The same way you would not use a fast but DOSable hash function for your hashmap.

New technique to easily partition CSV files for parallel processing

Yomguithereal — Wed, 25 Feb 2026 16:09:01 +0000

Article URL: https://github.com/medialab/xan/blob/master/docs/blog/csv_base_jumping.md

Comments URL: https://news.ycombinator.com/item?id=47153439

Points: 12

# Comments: 6

New comment by Yomguithereal in "Cursed engineering: jumping randomly through CSV files without hurting yourself"

Yomguithereal — Tue, 24 Feb 2026 16:29:58 +0000

TL;DR: Seeker struct from simd-csv Rust crate knows how to perform approximate random access in a CSV file [1]

The `xan` command line tool is therefore able to use it to perform single-pass map-reduce parallelization over CSV files and also binary search within sorted CSV data! [2]

[1]: https://docs.rs/simd-csv/latest/simd_csv/struct.Seeker.html [2]: https://github.com/medialab/xan/

New comment by Yomguithereal in "The SIMD-CSV crate chose not to use simdjson tricks to parse CSV with SIMD"

Yomguithereal — Wed, 03 Dec 2025 14:24:17 +0000

There is a section here with a table describing the kind of boost you might observe vs. rust-csv used by xsv: https://docs.rs/simd-csv/latest/simd_csv/#regarding-performa...

The SIMD-CSV crate chose not to use simdjson tricks to parse CSV with SIMD

Yomguithereal — Thu, 27 Nov 2025 15:02:53 +0000

Article URL: https://docs.rs/simd-csv/latest/simd_csv/#design-notes

Comments URL: https://news.ycombinator.com/item?id=46069874

Points: 13

# Comments: 3

Fast and Specialized Rust CSV Readers Using SIMD Instructions

Yomguithereal — Thu, 20 Nov 2025 16:06:27 +0000

Article URL: https://github.com/medialab/simd-csv

Comments URL: https://news.ycombinator.com/item?id=45994113

Points: 2

# Comments: 0

XAN: A Modern CSV-Centric Data Manipulation Toolkit for the Terminal

Yomguithereal — Thu, 27 Mar 2025 15:50:08 +0000

Article URL: https://github.com/medialab/xan

Comments URL: https://news.ycombinator.com/item?id=43494894

Points: 146

# Comments: 28

New comment by Yomguithereal in "A love letter to the CSV format"

Yomguithereal — Thu, 27 Mar 2025 08:57:02 +0000

the reversing bytes part is encoding agnostic. you just feed the reversed bytes to the csv parser then re-reverse both the yielded rows and the cells bytes and get the original order of the bytes themselves.

New comment by Yomguithereal in "A love letter to the CSV format"

Yomguithereal — Thu, 27 Mar 2025 08:21:24 +0000

xan is a maintained fork of xsv

New comment by Yomguithereal in "A love letter to the CSV format"

Yomguithereal — Thu, 27 Mar 2025 08:20:53 +0000

xan is a maintained fork of xsv

New comment by Yomguithereal in "A love letter to the CSV format"

Yomguithereal — Wed, 26 Mar 2025 21:22:16 +0000

A good way to parallelize CSV processing is to split datasets into multiple files, kinda like manual sharding. xan has a parallel command able to perform a wide variety of map-reduce tasks on splitted files.

https://github.com/medialab/xan