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FastJava Reference

1. CPU Feature Model

  • AVX2 — detected via CPUID. Enables 32-byte vector ops.
  • SSE4.2 — detected via CPUID. 16-byte fallback.
  • Fallback rule: AVX2 → SSE4.2 → scalar.

2. Guarantees

  • Zero-Copy: All operations use GetPrimitiveArrayCritical for direct memory access.
  • Unaligned Access: Safe on all byte boundaries.
  • Thread-Safety: All static native methods are thread-safe.

3. JNI & Memory Contracts

  • Direct Memory Pinning: No implicit copies are made by the JNI bridge.
  • No Allocation: All operations work on pre-allocated Java arrays or buffers.
  • Critical Sections: Native calls minimize blocking to prevent GC impact.

4. Platform Support

Platform Status
Windows 10/11 (x64) ✅ Fully Supported

Part of the FastJava Ecosystem — Making the JVM faster.

Made with ⚡ by Andre Stubbe