Help: mysh timed command summary:

Any command starting with a first character of % will be timed by mysh. This timing occurs in real time at the accuracy of the host timing facilities accessed by Ruby. No accounting for system access or other tasks is made.

Examples:

mysh>%say hello world
hello world
Elapsed execution time = 0.000 seconds.

mysh>%ls
CODE_OF_CONDUCT.md  LICENSE.txt  lib           pkg          samples
Gemfile             README.md    mysh.gemspec  rakefile.rb  tests
Gemfile.lock        bin          mysh.reek     reek.txt
Elapsed execution time = 0.047 seconds.