Samchika

for(int i=0;i<10000; ++i){ // do nothing just compute hash again and again. hash = str.hashCode(); } https://github.com/MayankPratap/Samchika/blob/ebf45acad1963d... "do nothing" is correct, "again and again" not so much. Java caches the hash code for Strings and since the JIT knows that (at least in recent version[1]) it might even remove this loop entirely. [1] https://news.ycombinator.com/item?id=43854337

Hi HN, I built a Java library called SmartFileProcessor to make high-performance, multi-threaded file processing simpler and more maintainable. Most Java file processing solutions either involve a lot of boilerplate or don’t handle concurrency, backpressure, or metrics well out of the box. I needed something fast, clean, and production-friendly — so I built this. Key features: Multi-threaded line/batch processing using a configurable thread pool Producer/consumer model with built-in backpressure Buffered, asynchronous writing with optional auto-flush Live metrics: memory usage, throughput, thread times, queue stats Simple builder API — minimal setup to get going Output metrics to JSON, CSV, or human-readable format Use cases: Large CSV or log file parsing ETL pre-processing Line-by-line filtering and transformation Batch preparation befor