[tialaramex]

The SSO capacity tables seem obviously wrong to me. For clang/libc++ we see 11 or 22 bytes, in each case it's the size of the whole data structure, minus one byte for the bit flag and length value, and another byte for the zero (ASCII NUL) that's obligatory in C++

But for MSVC and GCC we're told 16 bytes as each has a 16-byte buffer. However they still need that obligatory zero byte, for ASCII NUL so surely the table should show 15.

The most popular string in C++, the one which makes SSO almost obligatory as a design feature for the language's string object, is the empty string. On a modern (64-bit) machine Clang can store that inline in a local 24-byte object, MSVC and GCC need 32-bytes. Without SSO it would mean probably 24 bytes and a heap allocation. That's hard to swallow.

[tialaramex]

[Raymond has now corrected the charts in the article, and also made other fixes]