When comparing mksh (MirBSD Korn Shell) vs rc (shell), the Slant community recommends rc (shell) for most people. In the question“What are the best UNIX shells?” rc (shell) is ranked 6th while mksh (MirBSD Korn Shell) is ranked 9th. The most important reason people chose rc (shell) is:
rc is a very simple and easy to learn shell.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Very fast
mksh is very light on resources it needs to use and as a result it's quite fast. It also gets better results consistently than other alternatives when comparing benchmarks.
Pro Simple
rc is a very simple and easy to learn shell.
Pro C-like syntax
rc has very C-like syntax, which is very helpful for people who are used to C-like programming languages and will find rc's syntax very enjoyable. For example:
for (i in `{seq 1 100}) {
echo $i
}
Pro Sane array handling
In rc $array
expands to the whole array and if one of the elements of the array has spaces in it, it's still considered one single element after the array variable expansion.
Cons
Con Development is pretty slow
Mksh is part of MirBSD which is barely even being developed anymore nowadays.
Con Lacks return statement
rc has no return
statement.