openj9
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Description:
High performance, scalable, Java virtual machine
Type: Formula  |  Latest Version: 0.48.0@0  |  Tracked Since: Dec 23, 2025
Links: Homepage  |  @EclipseFdn  |  formulae.brew.sh
Category: Developer tools
Tags: java jvm eclipse openjdk runtime ibm
Install: brew install openj9
About:
OpenJ9 is a high-performance, scalable Java Virtual Machine (JVM) developed by the Eclipse Foundation. It is designed to be memory-efficient and fast, starting up quickly to optimize resource usage in cloud and containerized environments. This formula builds the IBM Semeru Runtime, providing a robust OpenJDK distribution for enterprise-grade Java applications.
Key Features:
  • Class Data Sharing (CDS) for reduced startup time and memory footprint
  • JIT compilation optimized for long-running server applications
  • Advanced diagnostics and garbage collection tuning options
  • Fully compatible with standard Java SE APIs
Use Cases:
  • Running high-throughput microservices in Docker or Kubernetes
  • Cloud-native Java application development requiring fast startup
  • Enterprise backend systems needing optimized memory management
Alternatives:
  • openjdk – The standard reference implementation; OpenJ9 offers significantly lower memory usage and faster startup times.
  • graalvm – Focuses on native compilation and polyglot languages; OpenJ9 focuses on JVM runtime efficiency.
Version History
Detected Version Rev Change Commit
Dec 23, 2025 3:09pm 0.48.0 0 VERSION_BUMP c6599e84
Sep 18, 2025 1:42am 0 VERSION_BUMP 55dccf99
Sep 17, 2025 7:59pm 0 VERSION_BUMP 81e06ad0
Nov 27, 2024 12:38am 0 VERSION_BUMP e5e2266a
Nov 8, 2024 10:23am 0 VERSION_BUMP 64218536
Nov 7, 2024 11:38pm 0 VERSION_BUMP 9d2b9707