TITLE:
FastMemory: 4K Video Frame Buffer SIMD-Aligned Memory vs Java Heap 🚀
DESCRIPTION:
Demonstrating FastMemory, a SIMD-aligned off-heap memory allocator for Java. This performance comparison shows 4K video frame buffer processing (3840x2160 pixels, 31 MB) using 32-byte aligned native memory with page locking versus traditional Java heap arrays.
TECHNICAL HIGHLIGHTS:
- 32-Byte SIMD Alignment: AVX2/AVX-512 vector operations without alignment penalties
- Physical Page Locking: VirtualLock prevents OS swap for real-time video processing
- Zero GC Overhead: Off-heap memory eliminates garbage collection pauses
- FastPointer Integration: Direct 64-bit address arithmetic for pixel manipulation
RESULTS:
- Write Speedup: 1.1x faster than Java heap arrays (21ms vs 23ms)
- SIMD-Ready: 32-byte alignment optimal for AVX2 vector instructions
- Page-Locked: Physical RAM residency prevents swap latency
- Memory Type: Off-heap native vs heap allocation
FASTJAVA CORE REPOSITORIES:
- FastMemory: https://github.com/andrestubbe/FastMemory
- FastPointer: https://github.com/andrestubbe/FastPointer
- FastSIMD: https://github.com/andrestubbe/FastSIMD
- FastSharedMemory: https://github.com/andrestubbe/FastSharedMemory
Ecosystem Overview: https://github.com/andrestubbe/FastJava
Part of the FastJava Ecosystem — Making the JVM faster.
Made with ⚡ by Andre Stubbe
TAGS:
Java, FastJava, FastMemory, SIMD, Off-Heap, AVX2, Video Processing, Memory Alignment, VirtualLock, Page Locking