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// llil2m.cpp. C++ 11 version of Perl llil.pl.
// C++ version inspired by Mario's famous dualvar two-sort Perl soluti
+on.
...

   return 0;
}

> llil2m big1.txt big2.txt big3.txt >llil2m.tmp
llil2m start
...
write  stdout      CPU  time : 1.383 secs
total              CPU  time : 9.074 secs
total             wall clock : 9 secs

> llil2m big1.txt big2.txt big3.txt >llil2m.tmp
llil2m start
...
total              CPU  time : 9.244 secs
total             wall clock : 9 secs
Memory use (Windows Private Bytes): 1,218,716K

// llil2grt.cpp.
// Inspired by llilgrt.pl: improve sort performance via a negative cou
+nt.
...

   return 0;
}

> llil2grt big1.txt big2.txt big3.txt >llil2grt.tmp
llil2grt start
...
total               CPU time : 7.254 secs
total        wall clock time : 7 secs
Memory use (Windows Private Bytes): 1,626,728K