[Bug gcov-profile/97834] gcov-instrumented binaries are very slow due to unbuffered IO

[roland.illig at gmx dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97834

Roland Illig <roland.illig at gmx dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |INVALID

--- Comment #8 from Roland Illig <roland.illig at gmx dot de> ---
Got it.  NetBSD's stdio is broken.

#include <stdio.h>

int main(void)
{
        char buf[4096];

        setbuf(stdin, NULL);
        fread(buf, 1, 4096, stdin);
        return 0;
}

This innocent-looking program indeed calls read(2) 4096 times.

Sorry for the interruption, thanks for your help.