GraalVM 25.2.4

(2026-07-28)

Platform and Distributions

Released GraalVM Community Edition 25.2.4, an innovation release, based on OpenJDK 25.0.4+7. See OpenJDK 25 Updates.
Released Oracle GraalVM 25.2.4, an innovation release, based on Oracle JDK 25.0.4+7. See Java SE 25 Release Notes.
Version compatibility:
- GraalVM 25.2.4 is compatible with Graal Languages and other components version 25.2.4.

Compressed 32-bit object references are now enabled by default, generally improving memory usage and performance. This limits the heap to 32 GB; disable compressed references with -H:-UseCompressedReferences when a larger heap is required.
Native Image now always uses isolates. The deprecated -H:+SpawnIsolates option remains for compatibility, but -H:-SpawnIsolates is no longer supported and reports a build-time error.
Removed the deprecated -H:OutlineWriteBarriers option. Use -H:WriteBarrierOutlining=<value> instead.
Java Vector API support is enabled by default when jdk.incubator.vector is part of the boot module layer. Use -H:-VectorAPISupport to opt out explicitly.
resource: URLs now preserve the source root of duplicate resource entries. This lets directory resources from separate class-path roots be converted to Path values and traversed independently.
Added support for the jdk.Shutdown JFR event.

Bytecode DSL added BytecodeRootNode.interceptIncomingValue(Object) and BytecodeRootNode.interceptOutgoingValue(Object) for converting values exchanged with tag instrumentation.
Bytecode DSL added multi-operand support for @Yield operations.
Bytecode DSL added @Return for user-defined return operations that customize the value returned from a bytecode root node.
Added HostCompilerDirectives.BytecodeInterpreterHandlerConfig#secondarySwitch() to prevent handler outlining when a secondary bytecode interpreter switch is compiled separately.

Find a complete list of updates in the Truffle Changelog.