Steven Schveighoffer wrote:
I thought one of the benefits of having immutable strings is that substrings were just pointers to slices of the original data in Java and .NET. So every time I do a substring in Java and .NET, it creates a copy of the data? That seems very wasteful, especially when the data is immutable...
I checked the source code for ClassPath's string implementation about a year ago. It copies to create a substring. I thought it was stupid.
On the other hand, ClassPath is an open source project and doesn't have hundreds of millions of dollars in backing, so I imagine Sun's String implementation is slightly smarter.
