A lot of what's in the Pure Bash Bible is horrifically slow. Many of those things are substantially faster, even when paying the cost of starting a new process,

A lot of what's in the Pure Bash Bible is horrifically slow. Many of those things are substantially faster, even when paying the cost of starting a new process, when you use an external and commonly available tool. I wrote a bash performance profiler that outputs data in a format that flamegraph.pl recognizes - it really helped identify where we could improve the performance of ZFSBootMenu. https://github.com/zbm-dev/zfsbootmenu/releases/tag/v1.12.0 https://github.com/zbm-dev/zfsbootmenu/releases/tag/v1.12.0 Don't fall in the trap of thinking things have to be written entirely in bash; it's okay to use other tools to help fill in the gaps.