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Elite Java

Low-memory JVM experiments. Graal Native. HotSpot intrinsics.

High-performance Java that defies the "enterprise bloat" stereotype. These experiments maximize throughput and minimize footprint via off-heap memory, SIMD, and native compilation.

Featured Experiments

Module RSS (Native) Key Technique
No-GC Parser 4.2 MB Off-heap MemorySegment → AST
Native CLI 8.0 MB Reflection-free GraalVM Native Image
SIMD Math 6.1 MB VectorAPI + intrinsic inlining
Zero-Alloc Streams 5.8 MB Primitive-specialized Spliterators

Technical Constraints

  • Zero Reflection: Reflection-free architectures for maximum GraalVM compatibility.
  • Memory Bound: Static heap targets of ≤ 32MB.
  • Modern Core: Java 21+ Virtual Threads (Loom) and Structured Concurrency.
  • No Bloat: Zero dependencies. No Spring, no Hibernate, no Jakarta.

Performance Profile

Task Input Java (Native) Rust Python
JSON Parse 1MB 3.2ms 2.1ms 187ms
CLI Startup - 12ms 89μs 245ms
SIMD Vector 10^6 1.1ms 0.9ms 412ms

Philosophy

Java is often misused. We treat the JVM as a systems-level tool to achieve:

  1. Mechanical Sympathy: Aligning data structures with L1/L2 cache lines.
  2. Deterministic Latency: Eliminating GC pauses via stack-allocation and off-heap storage.
  3. Instant Warmup: Leveraging AOT (Ahead-of-Time) compilation.

Usage

# Standard JVM (HotSpot)
./gradlew run

# Native Image (AOT)
./gradlew nativeCompile
./build/native/nativeCompile/experiment-name