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When it comes to optimizing scripts or simply understanding their behavior better, performance profiling is an indispensable tool. In the realm of Linux, perf stat is a powerful utility that helps developers profile applications down to the system call level. Here, we explore how to use perf stat to gain insights into the syscall and CPU usage of Bash scripts. Q1: What is perf stat and what can it do for profiling Bash scripts? A1: perf stat is a performance analyzing tool in Linux, which is part of the broader perf suite of tools. It provides a wide array of performance data, such as CPU cycles, cache hits, and system calls.