Duktape VS Wren

Compare Duktape vs Wren and see what are their differences.

Duktape

Duktape - embeddable Javascript engine with a focus on portability and compact footprint (by svaarala)

Wren

The Wren Programming Language. Wren is a small, fast, class-based concurrent scripting language. (by wren-lang)
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Duktape Wren
3 21
5,238 5,604
- 1.5%
8.0 3.5
23 days ago about 1 month ago
JavaScript C
MIT License MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

Duktape

Posts with mentions or reviews of Duktape. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2021-03-30.
  • 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 | reddit.com/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 | reddit.com/r/javascript | 30 Mar 2021
    - Duktape (4.8k stars)

Wren

Posts with mentions or reviews of Wren. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-05-05.

What are some alternatives?

When comparing Duktape and Wren you can also consider the following projects:

V8 - The official mirror of the V8 Git repository

Lua - Lua is a powerful, efficient, lightweight, embeddable scripting language. It supports procedural programming, object-oriented programming, functional programming, data-driven programming, and data description.

quickjs - Public repository of the QuickJS Javascript Engine. Pull requests are not accepted. Use the mailing list to submit patches.

LuaJIT - Mirror of the LuaJIT git repository

jerryscript - Ultra-lightweight JavaScript engine for the Internet of Things.

ChaiScript - Embedded Scripting Language Designed for C++

SWIG - SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages.

V7 - Embedded JavaScript engine for C/C++

squirrel - Official repository for the programming language Squirrel