JuliaLang/julia — comment on commit 6613162ba3219c8540ce9f94ae71f3074c012912
File: j/string.j line 234
By JeffBezanson:

I think the pitfall here is that if you do a sequence of these types of operations on a string, each primitive operation becomes a whole chain of methods. e.g. `reverse(reverse(str))` is much slower to operate on than a normal string.