TITLE:
FastPointer: Zero-Overhead Native Memory vs Java Heap Performance 🚀
DESCRIPTION:
Demonstrating FastPointer, a zero-allocation native memory abstraction for Java. This performance comparison shows 1,000,000 messages processed via native off-heap memory versus traditional Java heap objects, highlighting zero GC pressure and direct memory access benefits.
TECHNICAL HIGHLIGHTS:
- Zero-Allocation Arithmetic: 64-bit native pointer operations without intermediate Java objects
- Direct Memory Access: Unsafe-based primitive getters/setters for byte, int, float, double
- Off-Heap Memory: Native memory allocation eliminates GC pressure completely
- Real-World Benchmark: 1M message buffer test with timing and memory measurements
RESULTS:
- Write Speedup: 1.5x faster than Java heap objects (35ms vs 54ms)
- Read Speedup: 1.2x faster than Java heap objects (11ms vs 13ms)
- Memory Saved: 22.9 MB reduced memory footprint
- GC Pressure: Native = NONE | Heap = HIGH
FASTJAVA CORE REPOSITORIES:
- FastPointer: https://github.com/andrestubbe/FastPointer
- FastMemory: https://github.com/andrestubbe/FastMemory
- 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, FastPointer, Native Memory, Performance Benchmark, GC Optimization, Memory Management, C++, JNI, Unsafe