String views or some pointer into strings

[HertzDevil]

More discussion here:

More slices, less alloc?

Maybe it could be faster with some concept of just “pointing” to a Slice (i.e. sub slice) within a different (parent) String object? Java used to do this optimization. It ended up being problematic for the GC in certain situations as people kept references to the subslices around, but no references to the original string. But the original string couldn’t be freed as there were internal pointers around pointing into it. This made performance and memory usage harder to predict than was nice. So…