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Java and Javascript both use UTF-16 for internal string representation, even though JSON specifies UTF-8. Windows APIs too. I'm still not sure why, but it means

Java and Javascript both use UTF-16 for internal string representation, even though JSON specifies UTF-8. Windows APIs too. I'm still not sure why, but it means that one char uses at least 2 bytes even if it's in the ASCII range.

mark-r 3y ago
Early adopters of Unicode used the first available encoding, UCS-2. UTF-16 is an extension of that to handle the increased range of code points that came later.