[iv_08]

> You can't usefully index a unicode stream in constant time and do correct and useful textual stuff anyway

To find an index of a substring you need to scan the string, right. But once you have the byte index you can quickly jump to its position in the string, e.g. when you do a slice operation based on that index: s[i:]. If strings.Index() returned a code point index and not a byte index you would have to scan the string again.

[masklinn]

> To find an index of a substring you need to scan the string, right. But once you have the byte index you can quickly jump to its position in the string

Stop doing that and just get the bit of string you want in the first place?