On 20/07/18 13:51 +0300, niXman wrote:
Jonathan Wakely 2018-07-20 13:05:
On 20/07/18 12:44 +0300, niXman wrote:
Thanks. How did you verify it's an optimization?
Optimization is that there is no superfluous copying into string.
The to_string functions always pass at least __n=16 to __to_xstring,
which is larger than the SSO buffer in std::__cxx11::string, and so
forces a memory allocation.
I didn't think about this...
Avoiding an unconditional dynamic allocation is the main advantage of
using alloca.
