fst
itoa
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fst | itoa | |
---|---|---|
11 | 2 | |
1,707 | 277 | |
- | - | |
3.5 | 6.8 | |
3 months ago | 11 days ago | |
Rust | Rust | |
The Unlicense | Apache License 2.0 |
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fst
- fst: Represent large sets and maps compactly with finite state transducers
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Creating a perfect HashMap from string keys known in advance
I'd point you towards BurntSushi's fst crate: https://github.com/BurntSushi/fst
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How to use mmap safely in Rust?
The fst crate effectively relies on mmap for it to work right. The folks here suggesting you just use the heap might be right, but only if using the heap is actually plausible. If your dictionary is GBs big (an FST might be bigger than available memory), then copying it the heap first would be disastrous.
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Official /r/rust "Who's Hiring" thread for job-seekers and job-offerers [Rust 1.64]
You'll love what we're working on if you're interested in the implementation of:- Tantivy- Meilisearch- Finite State Transducers
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rustc is unacceptably slow compiling long lists of constant slices
Here's an example of longest prefix matching using a FST which I based my approach on: https://github.com/BurntSushi/fst/pull/104/files
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Official /r/rust "Who's Hiring" thread for job-seekers and job-offerers [Rust 1.63]
Finite State Transducers
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Wikit Desktop - A dictionary application using tauri GUI framework
As a result, I have a plan to implement a desktop version from then and I finished today with a beta version. The desktop is based on tauri, and the dictionary index algorithm is FST (it is an awesome index algorithm).
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WordBueno.com online dictionary. Fast, no frills, mobile friendly.
WordBueno’s data is currently derived from Wiktionary. The backend is using Rust’s warp with fst for indexing.
- Show HN: WordBueno: sleek dictionary built with Rust and Svelte
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Speed of Rust vs. C
No you don't. I've written multiple programs that load things instantly off the file system via memory maps. See the fst crate[1], for example, which is designed to work with memory maps.
Rust "works badly with memory mapped files" doesn't mean, "Rust can't use memory mapped files." It means, "it is difficult to reconcile Rust's safety story with memory maps." ripgrep for example uses memory maps because they are faster sometimes, and its safety contract[2] is a bit strained. But it works.
[1] - https://github.com/BurntSushi/fst/
[2] - https://docs.rs/grep-searcher/0.1.7/grep_searcher/struct.Mma...
itoa
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Potential problem with the package manager
The hyper package for the crab language actually has a dependency on a package that does itoa (among others) so IMO the problem exist there too and most non trivial packages will be bloated
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Debian discusses vendoring again
I see itoa which seems trivial on the surface. The implementation is highly optimized, but it's also covering all the different cases. I'm guessing this is for printing match counts or line numbers, and if this is actually a bottleneck for ripgrep — which seems unlikely — then maybe it's worth it. You know your own needs, and if it was a bottleneck, I bet you could do just as well, if not better, with a custom, smaller, simpler solution inside ripgrep. (i.e. just make sure the power-of-ten denominators are available at compile time so the compiler won't generate divisions.)
What are some alternatives?
rust-fnv - Fowler–Noll–Vo hash function
perl5 - 🐪 The Perl programming language
smartstring - Compact inlined strings for Rust.
libskry_r - Lucky imaging library
unicode-xid
tao - The TAO of cross-platform windowing. A library in Rust built for Tauri.
rust-base64 - base64, in rust
redgrep - ♥ Janusz Brzozowski
ucd-generate - A command line tool to generate Unicode tables as source code.
warp - A super-easy, composable, web server framework for warp speeds.
optparse - Portable, reentrant, getopt-like option parser