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Clojure 1.12.3

Clojure 1.12.3 is now available! Find download and usage information on the Downloads page. CLJ-2919 - Compiler - fix nested compilation emitting for keyword and protocol call sites

7 April 2026 at 09:50 am
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Clojure 1.12.3

Clojure 1.12.3 has been released, bringing a new version of the popular functional programming language to the community. This update focuses on improving the compiler's performance and addressing a specific issue related to nested compilation emitting for keyword and protocol call sites. Developers can now download the latest version from the official Downloads page, where detailed instructions and usage information are available.

The release of Clojure 1.12.3 is marked by the resolution of CLJ-2919, a compiler-related bug that affected the handling of nested compilation emitting for keyword and protocol call sites. This issue could lead to unexpected behavior or performance degradation in certain scenarios, particularly when dealing with complex code structures that involve multiple layers of compilation. By addressing this problem, the Clojure team has ensured that the language remains stable and efficient, providing a solid foundation for developers to build upon.

In addition to the fix for CLJ-2919, the Clojure 1.12.3 release also includes other minor improvements and optimizations. These enhancements aim to make the language even more efficient and user-friendly, allowing developers to write more concise and expressive code. While the primary focus of this release is on the compiler, the Clojure team continues to prioritize the overall health and performance of the ecosystem, ensuring that the language evolves in line with the needs of its users.

For those who are new to Clojure, it is a dynamic, general-purpose programming language that emphasizes immutability, concurrency, and functional programming principles. Developed by Rich Hickey, Clojure runs on the Java Virtual Machine (JVM), allowing it to leverage the extensive libraries and tools available in the Java ecosystem. Its unique combination of features makes it well-suited for a wide range of applications, from building scalable web applications to developing complex data processing pipelines.

To download and start using Clojure 1.12.3, developers can visit the official Downloads page. This page provides detailed instructions on how to obtain the latest version of the language, as well as guidance on setting up a development environment. The Clojure community is known for its welcoming and collaborative nature, and the release of new versions like 1.12.3 often sparks discussions and new projects within the community.

In conclusion, the release of Clojure 1.12.3 is a significant update that addresses a critical compiler issue while also bringing minor improvements to the language. With the fix for CLJ-2919 and other enhancements, developers can now enjoy a more stable and efficient Clojure experience. As always, the Clojure team remains committed to fostering an active and innovative community, ensuring that the language continues to thrive and evolve over time.

Source: Clojure News
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