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Top 23 Rust Text processing Projects
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ripgrep
ripgrep recursively searches directories for a regex pattern while respecting your gitignore
It's not really disputed since musl without mimalloc has a 144% overhead, so most of the performance issues do indeed come from the allocator, by a pretty large margin (~85% of it). Not only that, but some of the "other code" performance hit might still come from the allocator: when you set a global allocator on the Rust side, musl still uses its own allocator internally (as demonstrated by https://github.com/BurntSushi/ripgrep/issues/3494).
And the compounding issue is that the allocator issues get significantly worse as parallelism increases, as the allocator is serial, so as concurrency increases so does the impact of the allocator, which is not the case for most of the "regular slow" code (of musl), those have a relatively constant overhead per thread.
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chmln/sd
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regex
An implementation of regular expressions for Rust. This implementation uses finite automata and guarantees linear time matching on all inputs.
Project mention: Brave Browser unable to block certain ads due to Rust language limitations | news.ycombinator.com | 2026-03-27The title of this post is currently "Brave Browser unable to block certain ads due to Rust language limitations", which is ludicrous editorialization. Rust doesn't have regex in the language. Rust doesn't even have regex in the stdlib. The most popular crate for regex is https://crates.io/crates/regex , which is an engine whose design deliberately puts a reasonable upper bound on worst-case time complexity by deliberately excluding certain features. Guess what, if you want lookaround, there are regex engines in other crates that offer that: https://crates.io/crates/fancy-regex
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Project mention: I built a local-only shell history manager in Rust with AI agent tracking | dev.to | 2026-03-14
Fuzzy search powered by nucleo (same engine as Helix editor). Features:
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Project mention: MessageFormat: Unicode standard for localizable message strings | news.ycombinator.com | 2026-02-16
```
> How does layering pt_BR on pt_PT work?
MF does not prescribe fallback behavior. It also more popular to treat each locale as "complete" and fill "gaps" at build time. So at runtime you have `pt-BR` which has pt-BR strings and missing ones "completed" from `pt` (parent locale).
Fluent has a "resource manager" (simple one like this: https://github.com/projectfluent/fluent-rs/tree/main/fluent-... or more complex like Mozilla L10nRegistry), which can fallback at runtime, allowing for what we call "partial locales" which can roll out to production with gaps and the resource manager will fetch the fallback strings from the parent locale.
> What is a compelling reason to switch?
If you and your users are happy with gettext, none!
If either of those groups complain, there may be many:
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Project mention: Show HN: Headson – structure‑aware head/tail for JSON/YAML and source code | news.ycombinator.com | 2025-12-18
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rgx
regex101 for the terminal — real-time matching, 3 engines, capture groups, replace mode, syntax highlighting, plain-English explanations, undo/redo, mouse support. Written in Rust. (by brevity1swos)
Project mention: Rgx – terminal regex debugger with JSON output, colored matching, and 3 engines | news.ycombinator.com | 2026-03-24 -
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Matcher
A high-performance matcher designed to solve LOGICAL and TEXT VARIATIONS problems in word matching, implemented in Rust. (by Lips7)
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untanglr
Probabilistically split concatenated words using NLP based on English Wikipedia unigram frequencies.
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SaaSHub
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Rust Text processing discussion
Rust Text processing related posts
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RipGrep musl binaries occasionally segfault during very-large searches
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Grit: Rewriting Git in Rust with Agents
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Ripgrep AI Policy
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How to escape note-taking lock-in with plain markdown and git
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Tell HN: Fastmod Is Nice
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Brave Browser unable to block certain ads due to Rust language limitations
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Yes, all longest regex matches in linear time is possible
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A note from our sponsor - AppSignal
www.appsignal.com | 4 Sep 2026
Index
What are some of the best open-source Text processing projects in Rust? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | ripgrep | 67,702 |
| 2 | sd | 7,342 |
| 3 | regex | 4,014 |
| 4 | nucleo | 1,493 |
| 5 | Fluent | 1,355 |
| 6 | pomsky | 1,352 |
| 7 | aho-corasick | 1,286 |
| 8 | whatlang-rs | 1,087 |
| 9 | hck | 744 |
| 10 | textwrap | 524 |
| 11 | suffix | 281 |
| 12 | tabwriter | 273 |
| 13 | headson | 253 |
| 14 | UNIC | 248 |
| 15 | rgx | 233 |
| 16 | cpc | 161 |
| 17 | sliceslice-rs | 105 |
| 18 | srch | 78 |
| 19 | nlpo3 | 48 |
| 20 | ngrams | 27 |
| 21 | rule72 | 26 |
| 22 | Matcher | 19 |
| 23 | untanglr | 14 |
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