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What’s new in Kotlin 1.9.20?


Kotlin is a modern, cross-platform programming language that has been gaining popularity in recent years. It is a statically typed, compiled language that runs on the JVM, JavaScript, and WebAssembly. Kotlin is also gaining popularity for Android development, as it is the official language for Android app development. With the recent release of Kotlin 1.9.20, the language has reached a new level of maturity, offering a plethora of enhancements and features that empower developers to build robust and scalable solutions.

Kotlin 1.9.20 is the latest release of the Kotlin programming language. It was released on November 1, 2023. This release includes a number of new features and improvements, including:

Kotlin New Features and Updates

Kotlin Multiplatform: A Matured and Stable Foundation

One of the most significant advancements in Kotlin 1.9.20 is the stabilization of Kotlin Multiplatform. This feature enables developers to seamlessly share code across different platforms, including Android, iOS, and web, using a single codebase. The stabilization of Kotlin Multiplatform signifies its readiness for production environments, allowing developers to confidently build applications that can seamlessly adapt to various platforms.

Streamlined Multiplatform Project Setup

To further simplify the process of setting up multiplatform projects, Kotlin 1.9.20 introduces a new default hierarchy template. This template provides a structured approach to organizing project files and dependencies, making it easier for developers to navigate and manage their multiplatform projects.

Enhanced Gradle Configuration Cache Support

The integration of the Gradle Configuration cache into Kotlin Multiplatform significantly improves the performance of Gradle builds. This cache stores information about project dependencies, eliminating the need to repeatedly download and analyze them during each build. As a result, developers can enjoy faster build times and a more streamlined development experience.

Custom Memory Allocator for Kotlin/Native

Kotlin 1.9.20 introduces a custom memory allocator for Kotlin/Native, enabling developers to optimize the memory usage of their Kotlin/Native applications. This custom allocator provides fine-grained control over memory management, allowing developers to tune their applications for specific hardware and performance requirements.

Garbage Collector Enhancements for Kotlin/Native

Performance improvements in the garbage collector for Kotlin/Native further enhance the efficiency of Kotlin/Native applications. These enhancements reduce the overhead associated with garbage collection, leading to smoother performance and a more responsive user experience.

Additional Kotlin Features and Improvements

Kotlin 1.9.20 is packed with a host of additional features and improvements that aim to enhance the developer experience and expand the language’s capabilities. These include:

New enum class values function: This function returns a list of all possible values for an enum class.
New operator for open-ended ranges: This operator allows developers to create open-ended ranges with no upper or lower bound.
Preview of Gradle configuration cache in Kotlin Multiplatform: Developers can explore the Gradle configuration cache in Kotlin Multiplatform projects using this preview feature.
Changes to Android target support in Kotlin Multiplatform: These changes simplify the process of targeting different Android versions with Kotlin Multiplatform projects.
Preview of custom memory allocator in Kotlin/Native: Developers can experiment with the custom memory allocator in Kotlin/Native projects using this preview feature.

Upgrading to Kotlin 1.9.20: A Smooth Transition

For developers using older versions of Kotlin, upgrading to Kotlin 1.9.20 is a straightforward process. The Kotlin documentation provides comprehensive instructions for upgrading, ensuring a seamless transition to the latest version. If you’re looking to upgrade and need expert assistance, you can also consider to hire  Kotlin developer with experience in handling such upgrades and ensuring your codebase remains efficient and up-to-date.


Kotlin 1.9.20 represents a significant milestone in the evolution of Kotlin, solidifying its position as a powerful and versatile cross-platform programming language. With its enhanced features, improved performance, and streamlined development experience, Kotlin 1.9.20 empowers developers to build innovative and scalable applications that seamlessly adapt to the ever-changing landscape of mobile app development.

If you’re planning to leverage the capabilities of Kotlin 1.9.20 for your next project, consider partnering with a Kotlin app development company that specializes in harnessing the full potential of this language to deliver top-notch, cutting-edge applications.


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    Pranjal Mehta

    Pranjal Mehta is the Managing Director of Zealous System, a leading software solutions provider. Having 10+ years of experience and clientele across the globe, he is always curious to stay ahead in the market by inculcating latest technologies and trends in Zealous.


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