Use of String type

[johnmyleswhite]

In general, you'll want to use the ASCIIString or UTF8String types in your code, rather than the more generic String type. Judging from your current code, ASCIIString should suffice.

[tomaskrehlik]

Thanks for the note. Could you elaborate or share some link where would be described why this is better? (More efficient?) That is solely for my education, because now I would just blindly change the String to something else.

[johnmyleswhite]

Here's the relevant performance tip: http://docs.julialang.org/en/latest/manual/performance-tips/#declare-specific-types-for-fields-of-composite-types

String is an abstract type, so there's no way to fully specialize on it when the compiler's emitting code. For String's, this isn't so bad, but it's a good habit to get into for other types where there could be a huge performance loss when using abstract types rather than concrete types.