data preprocessing

When models are fast but results lag, pipeline glue is the bottleneck. This Bash-focused guide boosts AI throughput with minimal deps: measure with /usr/bin/time and pv; stream via pigz/jq instead of temp files; parallelise with GNU Parallel; cache pure stages content‑addressably; and add locks/Makefiles for safe, resumable runs—using standard tools (parallel, jq, pv, pigz/lz4, sqlite3, time) to deliver 40–70% wall‑clock savings.