Introduction
Erlang/OTP 29.0 marks a significant shift for the developer community, offering a range of new features and enhancements. Released on May 13, 2026, this major version aims to optimize security, efficiency, and versatility of applications built with Erlang. Let's explore what this update brings and how it can transform your developments.
Enhanced Security Features
One of the most notable improvements in this release is the implementation of the "secure by default" principle. The SSH daemon is now disabled by default for shell and exec services, preventing authenticated users from executing arbitrary Erlang code unless explicitly configured. Additionally, the SFTP subsystem is no longer enabled by default when starting an SSH daemon, further bolstering security.
Advanced Cryptographic Algorithms
Communication security is also enhanced with the integration of the post-quantum hybrid algorithm x25519mlkem768, now the preferred key exchange group in the default SSL configuration. This advancement prepares applications to withstand future threats posed by quantum computers.
Language Improvements
Erlang/OTP 29 introduces native records, a new data type that improves data structure handling. Although considered experimental, these records offer a more efficient alternative to traditional tuple-based records.
Another significant addition is the is_integer/3 guard operator, making it easy to verify that a value is an integer within a specified range. For example: is_integer(I, 0, 100).
Compiler and JIT Enhancements
The compiler now generates more efficient code for map comprehensions with constant values. Moreover, the JIT produces better code for matching or creating binaries with multiple little-endian segments. These enhancements translate into increased performance and improved application efficiency.
Conclusion
Erlang/OTP 29.0 is more than just an update; it's an evolution that lays the groundwork for more secure and efficient development. Whether you're a seasoned developer or an entrepreneur looking for robust solutions, this release offers new opportunities for innovation.
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