When comparing mksh (MirBSD Korn Shell) vs csh, the Slant community recommends mksh (MirBSD Korn Shell) for most people. In the question“What are the best Bash replacements?” mksh (MirBSD Korn Shell) is ranked 10th while csh is ranked 15th. The most important reason people chose mksh (MirBSD Korn Shell) is:
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.
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 Most influential Unix shell alongside sh
C shell introduced functionality such as history and editing mechanisms, aliases, directory stacks, tilde notation, cdpath, job control and path hashing.
Cons
Con Development is pretty slow
Mksh is part of MirBSD which is barely even being developed anymore nowadays.