NOTE

Go Strings

Immutable byte sequences, UTF-8 conventions, runes, indexing, conversion, and allocation.

GoCreated 08/09/2020Updated 09/15/20261 min readhistorical

This is a historical learning note and may contain outdated or incomplete understanding.

A Go string is an immutable sequence of bytes. Source text is commonly UTF-8, but a string can contain arbitrary bytes; indexing returns a byte, while ranging over a valid UTF-8 string decodes runes.

Converting between string and []byte normally creates distinct storage according to language semantics, though compilers may optimize safe cases. Use strings.Builder or buffers for repeated construction when profiling shows allocation pressure.