degasolv
rapidyaml
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| degasolv | rapidyaml | |
|---|---|---|
| 1 | 13 | |
| 14 | 517 | |
| - | - | |
| 0.0 | 5.7 | |
| about 3 years ago | 10 days ago | |
| Clojure | C++ | |
| Eclipse Public License 1.0 | MIT License |
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degasolv
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Parsing can become accidentally quadratic because of sscanf
I ran up against this issue when I was creating a parser that parsed debian package information (code here[1]). Trying to match against a line with regex slowed the program down past feasibility. I had to switch to just assuming that two line breaks meant a new package record instead. After that, the program was zippy.
1: https://github.com/djhaskin987/degasolv/blob/develop/cli-src...
rapidyaml
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Faces.js, a JavaScript library for generating vector-based cartoon faces
Interesting, I hadn't come across extism before. How hard would it be to package https://github.com/biojppm/rapidyaml in this way? (And do you have a extism for dummies guide?)
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A convenient C string API, friendly alongside classic C strings.
The inability, or brittleness, to embed NUL bytes into the string, for once. Zeroed bytes can be valid as an internal bytes of a longer encoded character. And the inefficiency of tempting every caller to rederive the string length on every use, leading to such bugs as quadratic parsing behavior with sscanf. The extra register for an explicit length is a very minute price to pay compared to that.
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Funniest line of code you wrote while making a game?
Although you still have the other problem of sscanf, where read times can become quadratic.
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yaml-cpp VS rapidyaml - a user suggested alternative
2 projects | 5 Feb 2022
- Since this is about json parsing and the tdarr json db can take ungodly times to load, maybe it's relevant?
- Parsing can become accidentally quadratic because of sscanf
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"Expanded and Enhanced"
You are really simplifying that issue. A lot of it has to be how the implementation of sscanf works and it's super easy to abuse by complete accident when a lot of data needs to be read and parsed to correct values. See more here: https://github.com/biojppm/rapidyaml/issues/40
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Accidentally quadratic: When Python is faster than C++
Leading to eye-rolling problems like these: https://github.com/biojppm/rapidyaml/issues/40
What are some alternatives?
glibc - Unofficial mirror of sourceware glibc repository. Updated daily.
wasm3 - 🚀 A fast WebAssembly interpreter and the most universal WASM runtime
PyBuilder - Software build automation tool for Python.
json-c - https://github.com/json-c/json-c is the official code repository for json-c. See the wiki for release tarballs for download. API docs at http://json-c.github.io/json-c/
clj-nix - Nix helpers for Clojure projects
Vrmac - Vrmac Graphics, a cross-platform graphics library for .NET. Supports 3D, 2D, and accelerated video playback. Works on Windows 10 and Raspberry Pi4.
earthly - Super simple build framework with fast, repeatable builds and an instantly familiar syntax – like Dockerfile and Makefile had a baby.
JitFromScratch - Example project from my talks in the LLVM Social Berlin and C++ User Group
boot - Build tooling for Clojure.
ctl - The C Template Library
text-unicode - Unicode text OT implementation