Now what about my own probably unjustified bash performance I mean style habit, using (( )) instead of [[ ]] whenever the arguments are all numerical. I'll eve

Now what about my own probably unjustified bash performance I mean style habit, using (( )) instead of [[ ]] whenever the arguments are all numerical. I'll even use $# or ${#a} in place of -z sometimes if it means being able to keep the whole test in a single (()) instead of needing a seperate [[]]. (also [[]] does not need -z. Just [[ $a ]] is the same.)