Which version of GCC are you using (that is, 3.3.0, 3.3.1 or 3.3.2)? From what I understand, there was a bug report for that and it was supposed to have been fixed in 3.3.2, or is slated to be fixed soon. It had to do with the I/O implementation calling a slow system function (something like snprintf or something). Perhaps someone knows better than I, but I know it's definitely not fixed in 3.3.1 or earlier. Cheers, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx]On Behalf Of Torsten Reuss Sent: Monday, December 15, 2003 2:08 PM To: gcc-help@xxxxxxxxxxx Subject: g++ 3.3 I/O Performance Hi, I'm wondering if anybody can help me on why g++-3.3 is about 80% slower than g++-2.95.4 for an I/O intensive program I'm working on. Now, before I go into the details, that's 80% slower with a call to ios::sync_with_stdio(false) inserted already. Without that it was 5 times slower.
