refactored, pre-buffer reuse

README.md

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+# Flash Benchmarking Module
+
+This module is designed for high-concurrency benchmarks using `wrk`.
+
+## Prerequisite
+- Java 21+
+- `wrk` installed (`sudo apt install wrk` on Linux/WSL)
+
+## Running the benchmarks
+
+1. **Build the project** (from the root directory):
+   ```bash
+   mvn clean package -DskipTests
+   ```
+
+2. **Start the benchmark server**:
+   ```bash
+   java -jar flash-bench/target/flash-bench-1.0-SNAPSHOT.jar
+   ```
+
+3. **Execute the benchmark suite** (from a new terminal):
+   ```bash
+   cd flash-bench
+   ./benchmark.sh
+   ```
+
+### Advanced: Random IDs Benchmarking
+To test the speed of parameter extraction across millions of unique IDs:
+```bash
+wrk -t12 -c500 -d30s -s pipeline.lua http://127.0.0.1:8080
+```