An informal comparison of the three major implementations of std::string - The Old New Thing
May 10th, 2024
We saw some time ago that the three major implementations of std::string are all quite different. To summarize:
// gcc
struct string
{
char* ptr;
size_t size;
union {
size_t capacity;
char buf[16];
};
bool is_large() { return ptr != buf; }
auto data() { return ptr; }
auto size() { return size; }
auto capacity() { return is_large() ? capacity : 15; }
};
// msvc
struct string
{
union {
char* ptr;
char buf[16];
};
size_t size;
size_t capacity;
bool is_large() { return capacity > 15;...
Read more at devblogs.microsoft.com
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