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D (Programming Language) VS jRuby

Compare D (Programming Language) VS jRuby and see what are their differences

D (Programming Language) logo D (Programming Language)

D is a language with C-like syntax and static typing.

jRuby logo jRuby

A high performance, stable, fully threaded Java implementation of the Ruby programming language
  • D (Programming Language) Landing page
    Landing page //
    2023-05-09
  • jRuby Landing page
    Landing page //
    2023-06-24

D (Programming Language) features and specs

  • Performance
    D is designed to be a high-performance systems programming language, offering performance comparable to C and C++ through native machine code compilation.
  • Expressiveness
    D features a rich standard library and modern language constructs, such as garbage collection, first-class arrays, and advanced templating, making it easier to write expressive and maintainable code.
  • Memory Safety
    D offers optional garbage collection along with manual memory management. This hybrid approach can help in developing safer applications by reducing memory-related errors.
  • Interoperability
    D can easily interoperate with C API, enabling seamless integration with existing C libraries and systems. It also supports better C++ interoperability compared to other languages.
  • Built-in Unit Testing
    D has built-in support for unit tests, allowing developers to write and run tests as part of the language itself, facilitating test-driven development.
  • Concurrency
    D offers built-in concurrency support with message passing, similar to the actor model found in languages like Erlang, making it easier to write concurrent and parallel programs.

Possible disadvantages of D (Programming Language)

  • Adoption
    D is not as widely adopted as other languages like C, C++, or Java. This limited adoption means fewer libraries, frameworks, and community support.
  • Toolchain Maturity
    While D's compilers and tools have improved over the years, they may still lack the maturity and feature set of more established languages, which can affect developer productivity.
  • Learning Curve
    D's richness and combination of paradigms (such as imperative, object-oriented, and functional programming) can present a steep learning curve for new developers.
  • Garbage Collection
    Although D offers optional garbage collection, its reliance on it for memory safety might be seen as a drawback for real-time system development where deterministic memory management is crucial.
  • Ecosystem
    The ecosystem for D is less vibrant compared to more popular languages, leading to potentially fewer third-party libraries, tools, and resources.
  • Standard Library Documentation
    The standard library documentation can be inconsistent or less comprehensive compared to other languages, making it difficult for developers to fully utilize all features of the language.

jRuby features and specs

  • Performance
    JRuby runs on the Java Virtual Machine (JVM), which allows it to leverage the JVM's performance optimizations like just-in-time compilation, potentially making it faster than traditional Ruby interpreters.
  • Java Integration
    JRuby allows seamless integration with Java libraries and frameworks, enabling developers to utilize the vast ecosystem of Java packages and tools alongside Ruby code.
  • Concurrency
    Thanks to the JVM's native threading capabilities, JRuby can offer better support for concurrent execution of code, potentially leading to improved performance in multi-threaded applications.
  • Mature Ecosystem
    JRuby inherits the mature tooling and extensive ecosystem from Java, including robust IDEs, debugging tools, and monitoring systems, which can enhance development and deployment processes.
  • Cross-Platform
    Running on the JVM allows JRuby to be inherently cross-platform, making it easier to deploy applications across different operating systems without requiring platform-specific adaptations.

Possible disadvantages of jRuby

  • Startup Time
    JRuby can have a longer startup time due to the initialization overhead of the JVM, which can be a disadvantage for applications that require rapid startup and shutdown times.
  • Memory Usage
    Applications running on the JVM tend to have higher memory usage compared to native Ruby interpreters, which can be a concern for resource-constrained environments.
  • Compatibility
    Although JRuby aims for compatibility with CRuby, there can be differences or limitations, particularly with C extensions, which can restrict the usage of certain Ruby gems not written in pure Ruby.
  • Complexity
    Integrating JRuby into a Java ecosystem might add complexity, especially for teams not familiar with the JVM, Java build tools, or Java ecosystem practices.
  • Community Size
    JRuby, while popular, does not have as large a community as CRuby (the standard Ruby interpreter), which may result in fewer resources or smaller community-driven support avenues compared to CRuby.

Analysis of D (Programming Language)

Overall verdict

  • Overall, D is a solid programming language choice that balances performance with productivity. It may not be as widely adopted as some other languages, but it has a dedicated community and continues to evolve, making it a viable option for various programming tasks.

Why this product is good

  • The D programming language is considered good by many developers for various reasons. It combines the performance and low-level control of C/C++ with the expressive power and ease of use found in modern languages. D offers features like garbage collection, first-class functions, and compile-time function execution, providing both speed and flexibility. Its interoperability with C, the convenience of a powerful standard library (Phobos), and the availability of packages via the DUB package manager make it a practical choice for systems programming, application development, and rapid prototyping.

Recommended for

  • System programming enthusiasts looking for an alternative to C/C++
  • Developers interested in writing high-performance applications
  • Programmers who appreciate modern language features and strong community support
  • Projects requiring seamless C integration
  • Individuals looking for a language that supports easy code maintenance and scalability

Analysis of jRuby

Overall verdict

  • JRuby is a mature, high-performance implementation of Ruby on the Java Virtual Machine that offers a compelling option for developers who need Ruby's expressiveness combined with the JVM's ecosystem, concurrency capabilities, and enterprise integration.

Why this product is good

  • Runs Ruby code on the JVM, giving access to Java libraries and the broad Java ecosystem
  • True multithreading without a Global Interpreter Lock, enabling better use of multi-core hardware
  • Strong performance for long-running applications thanks to JVM JIT compilation and mature garbage collection
  • Seamless interoperability that lets you call Java classes from Ruby and vice versa
  • Compatible with much of the standard Ruby language and many popular gems and frameworks like Rails
  • Backed by an active open-source community and a long, stable development history
  • Enables deployment on Java application servers and integration into existing Java/enterprise infrastructure

Recommended for

  • Teams that want to write Ruby but deploy on JVM-based enterprise infrastructure
  • Applications needing true parallelism and heavy concurrency across multiple cores
  • Developers who need to leverage existing Java libraries within Ruby projects
  • Long-running services that benefit from JVM performance and tooling
  • Organizations standardized on the JVM but wanting Ruby's developer productivity

D (Programming Language) videos

D Language Tutorial

jRuby videos

No jRuby videos yet. You could help us improve this page by suggesting one.

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Category Popularity

0-100% (relative to D (Programming Language) and jRuby)
Programming Language
92 92%
8% 8
OOP
91 91%
9% 9
Generic Programming Language
Development
100 100%
0% 0

User comments

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Social recommendations and mentions

Based on our record, D (Programming Language) seems to be more popular. It has been mentiond 60 times since March 2021. 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.

D (Programming Language) mentions (60)

  • Ask HN: What is your (AI) dev tech stack / workflow? (June 2026)
    I've spent 2 weeks (2-4h per day) to make D language[1] version of Sciter SDK [2] Choice of AI "tooling" was by accident - typed something like "how to define copy constructor in D for custom structure" in Microsoft's Copilot in Edge browser that gives context for AI. The answer was good enough for me and so I went with it further. [1] D language HQ : https://dlang.org/. - Source: Hacker News / about 1 month ago
  • Rue: Higher level than Rust, lower level than Go
    > Mostly, I am not really trying to compete with C/C++/Rust on speed, but I'm not going to add a GC either. So I'm somewhere in there. Out of curiosity, how would you compare the goals of Rue with something like D[0] or one of the ML-based languages such as OCaml[1]? 0 - https://dlang.org/ 1 - https://ocaml.org/. - Source: Hacker News / 7 months ago
  • Pony: An actor-model, capabilities-secure, high-performance programming language
    The D language home page has something similar with a drop down with code examples https://dlang.org/. - Source: Hacker News / 12 months ago
  • Show HN: D++lang โ€“ A new systems programming language with Python-like syntax
    What is this? There's a lot of red flags here. * The name "D" for a programming language was taken in 1999: https://dlang.org/. - Source: Hacker News / about 1 year ago
  • Koto Programming Language
    >For me the biggest gap in programming languages is a rust like language with a garbage collector, instead of a borrow checker. I cannot agree more that's the much needed sweet spot/Goldilock/etc. Personally I have been advocating this approach for some times. Apparently the language is already widely available and currently has stable and wide compiler support including the venerable GNU compiler suite (GDC). It... - Source: Hacker News / over 1 year ago
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jRuby mentions (0)

We have not tracked any mentions of jRuby yet. Tracking of jRuby recommendations started around Mar 2021.

What are some alternatives?

When comparing D (Programming Language) and jRuby, you can also consider the following products

C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation

RubyGems - RubyGems. org is the Ruby community's gem hosting service. Instantly publish your gems and then install them. Use the API find out more about available gems. Become a contributor and improve the site yourself.

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

Scala Lang - Scala is a pure-bred object-oriented language that runs on the JVM

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

JavaScript - Lightweight, interpreted, object-oriented language with first-class functions