krep is an optimized string search utility designed for maximum throughput, low-latency feedback, and modern command-line ergonomics when processing large files and source trees. It combines mmap-based I/O, adaptive algorithms, SIMD acceleration where available, multi-pattern search, recursive traversal controls, JSON Lines output, contextual display, and machine-friendly stats. Note: Krep is not intended to be a full replacement or direct competitor to feature-rich tools like grep or ripgrep. Instead, it aims to be a minimal, efficient, and pragmatic tool focused on speed and simplicity. Krep provides the essential features needed for fast searching, without the extensive options and complexity of more comprehensive search utilities. Its design philosophy is to deliver the fastest possible search for the most common use cases, with a clean and minimal interface.