profiling

Practical guide to speeding up Bash at scale by pairing classic UNIX tools with AI: profile first, trace bottlenecks, feed data to an LLM for targeted, minimal-diff refactors, then benchmark and test to lock in wins. Covers setup (hyperfine, strace, jq, ShellCheck, shfmt, rg/fd, GNU parallel, pv), common fork-reducing rewrites, example pipelines, prompts, and portability tips for safe, reproducible performance gains.

Profiling Bash scripts with `perf stat` helps optimize performance by analyzing CPU and system call usage. Simple to use, developers can prepend `perf stat` to their command, receiving detailed output on CPU cycles, cache hits, and more, aiding in pinpointing inefficiencies and understanding resource use in Linux environments.