Hello Alex, >> This type has a strange history. In my book, I note: >> >> Although the clock_t return type of clock() is the same >> data type that is used in the times() call, the units of >> measurement employed by these two interfaces are >> different. This is the result of historically conflicting >> definitions of clock_t in POSIX.1 and the C programming >> language standard. > > > Ahhh now I get it. So CLOCKS_PER_SEC doesn't mean CLOCK_TICKS_PER_SEC, > right? I always thought that it really was that, and clock() simply > returned clock ticks. But it looks like it returns an arbitrary > division of the second called CLOCKS_PER_SEC. More or less. But the standard also says (in the <time.h> spec): The value of CLOCKS_PER_SEC shall be 1 million on XSI-conformant systems. (Yes, it is odd.) Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
