=head2 How can I measure time under a second?
-In general, you may not be able to. The Time::HiRes module (available
-from CPAN) provides this functionality for some systems.
+The Time::HiRes module (available from CPAN) provides this
+functionality for some systems.
In general, you may not be able to. But if your system supports both the
syscall() function in Perl as well as a system call like gettimeofday(2),