-time lzop >/dev/null >file
-time gzip >/dev/null >file
-time bzip2 >/dev/null >file
-time xz >/dev/null >file
+time lzop >/dev/null <testfile
+time gzip >/dev/null <testfile
+time bzip2 >/dev/null <testfile
+time xz >/dev/null <testfile