slow:The predefined global constant STDERR has the encodings set by #set_encoding
slow:The predefined global constant STDIN retains the encoding set by #set_encoding when Encoding.default_external is changed
slow:The predefined global constant STDIN has the encodings set by #set_encoding
slow:The predefined global constant STDOUT has the encodings set by #set_encoding
slow:The predefined global constant ARGV contains Strings encoded in locale Encoding
linux:Global variable $0 actually sets the program name
slow:Global variable $0 is the path given as the main script and the same as __FILE__
slow:Global variable $? is thread-local
