Duktape Alternatives

Duktape reviews and mentions

• Roll your own JavaScript runtime, pt. 3
  3 projects | news.ycombinator.com | 4 May 2023
• How to Create a Modern C Project with CMake and Conan
  2 projects | /r/C_Programming | 26 Apr 2023

  Im my projects I search for single file libs.(like https://github.com/svaarala/duktape etc...)

• Is there anyway to bypass the limit of rand()?
  1 project | /r/C_Programming | 20 Nov 2022

  Use lrand48(), or better, implement a high-quality RNG like PCG or splitmix64.

• Libgrapheme: A simple freestanding C99 library for Unicode
  6 projects | news.ycombinator.com | 15 Nov 2022

  You can also refer to the Unicode routines of other small JS engines[1,2], those don’t use ICU either, although the implementations are mercilessly size-optimized (to put it politely) and restricted to what the target JS version requires (e.g. casemapping but no normalization).

  [1] https://github.com/bellard/quickjs/blob/master/libunicode.c

  [2] https://github.com/svaarala/duktape/blob/master/src-input/du...

• Duktape
  1 project | news.ycombinator.com | 8 Oct 2022
• Nan Boxing
  3 projects | news.ycombinator.com | 16 Sep 2022
• YouTube-dl has a JavaScript interpreter written in 870 lines of Python
  19 projects | news.ycombinator.com | 10 Sep 2022

  I was expecting this to be about Duktape <https://github.com/svaarala/duktape>, but heh, for sure no. I'd bet $1 there's no way youtube-dl would switch, but I wonder if yt-dlp would?

• Optimizations Enabled by -ffast-Math
  1 project | news.ycombinator.com | 20 Oct 2021

  Fast math optimizations can break code like this by breaking isNaN.

  I was porting a C++ project to a certain platform - and that platform enabled a -ffast-math equivalent by default in Release (but not Debug) builds! This broke duktape, a JS engine said project embedded, in some nasty and subtle ways. Instead of storing a number/pointer/??? (8 bytes) + type tag (4? bytes) for each dynamically typed JS value, duktape can bit-pack values into a single 8 byte "double" value by storing object/string handles as NaN values - this isn't an uncommon trick for dynamically typed scripting stuff:

  https://github.com/svaarala/duktape/blob/c3722054ea4a4e50f48...

  Naturally, the -ffast-math equivalent broke isNaN checks, which caused random object/string handles to be mistakenly reinterpreted as "numbers" - but only in Release builds, for this one particular platform, in one rarely taken branch, so neither QA nor CI caught it, leading to hours of manufacturing a repro case, stepping through an absurd amount of code, and then finally looking at the default build rules and facepalming.

  Cursing the platform vendor under my breath, I overrode the defaults to align with the defaults of every other config x platform combination we already had: no fast math. If you want those optimizations, use SSE-friendly NaN-avoiding intrinsics - or, if you must use the compiler flags, ensure you do so consistently across build configs and platforms, perhaps limited to a few TUs or modules if possible. This allows you to have a chance at using your Debug builds to debug the resulting "optimizations".

• Can C++ and JS be used together?
  1 project | /r/learnprogramming | 27 Apr 2021

  Sure. For example, DukTape is an implementation of Javascript designed to be embedded in other projects. Google's V8 Javascript engine (used in Chrome), can also be embedded, see Node.Js for example.

• [AskJS] Do you use JavaScript on Microcontrollers? Which engine / interpreter?
  5 projects | /r/javascript | 30 Mar 2021

  - Duktape (4.8k stars)

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