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Crystal (programming language) VS SqueakJS

Compare Crystal (programming language) VS SqueakJS and see what are their differences

Crystal (programming language) logo Crystal (programming language)

Programming language with Ruby-like syntax that compiles to efficient native code.

SqueakJS logo SqueakJS

Squeak VM in JavaScript for running Squeak images in your browser.
  • Crystal (programming language) Landing page
    Landing page //
    2022-01-26
  • SqueakJS Landing page
    Landing page //
    2021-09-22

Crystal (programming language) features and specs

  • Performance
    Crystal is designed to have the performance of C, thanks to its compilation to efficient native code. Its static type system and low-level memory management capabilities allow optimized execution.
  • Syntax
    Crystal offers a syntax that is heavily inspired by Ruby, making it intuitive and familiar for Ruby developers. This can significantly reduce the learning curve and improve developer productivity.
  • Type Inference
    Crystal provides powerful type inference, enabling developers to write less boilerplate code while still benefiting from the safety and performance of a statically-typed language.
  • Concurrency
    Crystal supports lightweight concurrency with fibers, which allows developers to write efficient and scalable concurrent programs with a simpler syntax compared to traditional threading models.
  • Community and Ecosystem
    Crystal has an active and growing community. It also boasts a rich ecosystem with libraries and tools, making it easier for developers to find resources and support.

Possible disadvantages of Crystal (programming language)

  • Maturity
    Crystal is still a relatively young language compared to more established languages like Python or Java. This can mean fewer resources, libraries, and tools, as well as potential instability in certain areas.
  • Compilation Time
    Crystal's compilation times can be slower compared to interpreted languages, particularly for larger codebases. This can impact development workflows and iteration speed.
  • Binary Size
    Compiled Crystal programs tend to generate larger binary sizes compared to other compiled languages like Go or Rust. This can be a consideration for resource-constrained environments.
  • Platform Support
    Being less mature, Crystal may have fewer options for platform-specific optimizations and integrations, which could limit its use in certain specialized applications.
  • Tooling
    Although the situation is improving, Crystal's tooling ecosystem is not as mature as those of older languages. This can affect the availability and quality of IDE support, debugging tools, and other development aids.

SqueakJS features and specs

  • Cross-Platform Accessibility
    SqueakJS runs in any modern web browser, making it accessible on different operating systems without the need for installation.
  • Legacy Software Support
    It allows the execution of classic Smalltalk applications, providing a platform to run and preserve older software.
  • Educational Use
    SqueakJS can be used for educational purposes, enabling students to learn Smalltalk and web technologies.
  • Open Source
    Being open source, SqueakJS fosters community collaboration and allows users to customize or extend the platform to their needs.
  • Lightweight
    Since it operates entirely in the browser, it consumes fewer system resources compared to native virtual machine installations.

Possible disadvantages of SqueakJS

  • Performance Limitations
    As it runs in a browser, SqueakJS may not perform as efficiently as native Smalltalk virtual machines, especially for computation-heavy tasks.
  • Browser Dependency
    Its functionality is dependent on browser capabilities, which might lead to inconsistencies or issues across different browsers or versions.
  • Limited Hardware Interaction
    Running within a browser, it might have restricted interaction with certain hardware elements, limiting its use in specific scenarios compared to native environments.
  • Security Concerns
    Running applications in a browser exposes them to typical web security risks, requiring careful attention to ensure safe use.

Analysis of Crystal (programming language)

Overall verdict

  • Crystal is considered a good choice for developers who appreciate the syntax and flexibility of Ruby but require the performance and safety of a compiled language. Its balance of readability and efficiency makes it ideal for projects where high performance is critical but developer productivity cannot be sacrificed. However, potential users should consider the relatively smaller community compared to more established languages.

Why this product is good

  • Crystal is designed to combine the elegance and productivity of Ruby with the performance and efficiency of a compiled language. It offers a syntax that is close to Ruby, making it easy to read and write, while its compiler produces highly optimized native code. The language features static type checking, which helps catch errors at compile time, and it comes with powerful concurrency support through lightweight fibers. Additionally, Crystal's extensive standard library and growing ecosystem make it suitable for a wide range of applications.

Recommended for

  • Developers who enjoy Ruby's syntax but need better performance.
  • Projects that require strong concurrency support.
  • Applications where native code performance is a priority.
  • Developers willing to explore a language with a smaller ecosystem.

Category Popularity

0-100% (relative to Crystal (programming language) and SqueakJS)
Programming Language
93 93%
7% 7
IDE
0 0%
100% 100
Generic Programming Language
OOP
100 100%
0% 0

User comments

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Social recommendations and mentions

Based on our record, Crystal (programming language) seems to be a lot more popular than SqueakJS. While we know about 123 links to Crystal (programming language), we've tracked only 5 mentions of SqueakJS. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Crystal (programming language) mentions (123)

  • Ruby for Good
    Which can include type assertions but also a lot more. The agents seem to do well with this. I've also had good results using agents to write Crystal https://crystal-lang.org/ which is Ruby-like but does have the static types and produces blazing fast static binaries. Might be a sweet spot for coding agents if you're building some backend services. But I'd still pick Ruby on Rails for a new full stack project. - Source: Hacker News / 3 months ago
  • Ask HN: What Are You Working On? (May 2026)
    Sounds a lot like Crystal, which is also similar to Ruby and features a green fiber runtime: https://crystal-lang.org/#concurrency. - Source: Hacker News / 3 months ago
  • A Grand Vision for Rust
    > 1. Go with a better type system. A compiled language, that has sum types, no-nil, and generics. I was looking for something like that and eventually found Crystal (https://crystal-lang.org) as a closest match: LLVM compiled, strong static typing with explicit nulls and very good type inference, stackfull coroutines, channels etc. - Source: Hacker News / 6 months ago
  • Response to Ruby Is Not a Serious Programming Language
    Wondering why https://crystal-lang.org/ hasn't been mentioned in the comments. - Source: Hacker News / 9 months ago
  • Show HN: รœ Programming Language
    > What kind of code snippets could you suggest? Anything really! Some websites that do this currently: https://ziglang.org, https://crystal-lang.org and https://www.ruby-lang.org/en > I have a comparison table mentioning features Yes - I did see this in the README. Maybe worth adding it, or something similar to the website. - Source: Hacker News / 10 months ago
View more

SqueakJS mentions (5)

  • Ask HN: Any Recommendations Around Programming on an iPad?
    There was recently a related story on porting godot to the iPad: https://news.ycombinator.com/item?id=41415077. - Source: Hacker News / almost 2 years ago
  • Smalltalk simplicity and consistency vs. other languages (2022) [video]
    > And I'd like to be able to create applications that run without shipping the entire Smalltalk VM. There's always a javascript vm... https://squeak.js.org/. - Source: Hacker News / over 2 years ago
  • Squeak 6.0 has been released!
    It actually gets more complicated because there are ports of Squeak descendants than run in-browser. https://squeak.js.org is a Smalltalk virtual machine written in Javascript and that has allowed some crazy browser based stuff. https://pharojs.org PharoJS is a slightly different approach. It provides tools to deploy your Pharo developed code into the browser. Source: about 4 years ago
  • Ask HN: Share Your Personal Site
    Oh sorry, HN usability played with our hearts :D The message was meant to this other dev, quite cool mind map: https://wiki.nikitavoloboev.xyz And I'm impressed by what you have done there. I even played a bit of DOOM heh. Your project reminded me a little bit of https://squeak.js.org in the sense of having a full OS like thing in the browser. Congrats for the achievement! - Source: Hacker News / over 4 years ago
  • Fabrik a Visual Programming Environment
    So there is [1] https://squeak.js.org/ and [2] https://github.com/codefrau/SqueakJS which seems to be able to not only run Squeak, but also [3] https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev/wiki/Run-Cuis-in-the-Web-Browser.-(SqueakJS) and [4] https://github.com/carolahp/pharo on common JS-runtimes in acceptable speeds. There is also [5] https://caffeine.js.org/ and [6]... - Source: Hacker News / almost 5 years ago

What are some alternatives?

When comparing Crystal (programming language) and SqueakJS, you can also consider the following products

Nim (programming language) - The Nim programming language is a concise, fast programming language that compiles to C, C++ and JavaScript.

Smalltalk - Smalltalk is an object-oriented programming (OOP) language. It is objects all the way down.

Go Programming Language - Go, also called golang, is a programming language initially developed at Google in 2007 by Robert...

Pharo - Pharo is a pure object-oriented programming language and a powerful environment, focused on...

V (programming language) - Simple, fast, safe, compiled language for developing maintainable software.

React Studio - Create app flows and components. Express their properties and data linkage visually.