[Bug libstdc++/63466] sstream is very slow

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63466

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The C code:

$ time ./tstream-c < testfile 

real    0m0.058s
user    0m0.055s
sys     0m0.003s

My rewrite without <sstream> from comment 4:

$ time ./a.out < testfile 

real    0m0.095s
user    0m0.089s
sys     0m0.006s


So I still don't think there's anything to "fix" here. If you don't need the
full flexibility of a stringstream (and new variables to hold copies of the
input, rather than splitting in in-place) then don't do it that way.