I don't know exactly how much (2x?), but certainly can be faster and should just
exploit a "bulky" algorithm very similar to what we have for istream::getline
and getline(istream, string) - for char and wchar_t - see istream.cc. An
annoying
complication in this case is the use of ctype::is, which, at present at least,
cannot be as fast as traits::find: that's why I cannot exactly estimate the
margin
of improvement, but it's worth a try and certainly long term it's the way to go
even if at the moment ctype::is turns out to be a performance bottleneck.
--
Summary: operator>>(istream, string/CharT*) can be faster
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P2
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pcarlini at suse dot de
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22515
