C:\test>perl -v

This is perl 5, version 16, subversion 1 (v5.16.1) built for MSWin32-x64-multi-thread
(with 1 registered patch, see perl -V for more detail)

...

C:\test>perl -E"say `tasklist|find \"$$\"`; $x=chr(0); $x x= 1040351; say `tasklist|find \"$$\"`; undef $x; say `tasklist|find \"$$\"`"
perl.exe                     17672 Console                    1      4,992 K
perl.exe                     17672 Console                    1      6,080 K
perl.exe                     17672 Console                    1      6,084 K


C:\test>perl -E"say `tasklist|find \"$$\"`; $x=chr(0); $x x= 1040352; say `tasklist|find \"$$\"`; undef $x; say `tasklist|find \"$$\"`"
perl.exe                    270080 Console                    1      4,912 K
perl.exe                    270080 Console                    1      6,016 K
perl.exe                    270080 Console                    1      5,012 K