bash performance

Practical guide to using AI as a Bash performance co-pilot: install a cross-distro toolbox, baseline with time/hyperfine/strace, generate an AI context pack from traces, ask for vectorized/parallel replacements for loop-heavy code, auto-benchmark and verify outputs, then lock in gains with ShellCheck/shfmt/Bats. Includes prompts, safe filename handling, common wins (rg/fd/awk/parallel), and a real dedupe case showing 5-10x speedups.