On Sunday, September 27, 2015 at 6:31:33 AM UTC-4, Tim Holy wrote: > > I think the only advantage of ASCIIString is that str[8:12] is performant, > because you know the byte offset directly from the index. That's not true > for > UTF8String.
The indices passed to strings in Julia are byte offsets, not character offsets. So str[8:12] has the same complexity for UTF8String as for ASCIIString. (The downside of this is that it is possible to pass invalid byte indices to a UTF8String, which throws an exception. See https://github.com/JuliaLang/julia/issues/9297 for a proposal to avoid this.)
