prelude: |
  str = 'xxxhogexxx'
benchmark:
  vm_regexp: |
    /hoge/ =~ str
  vm_regexp_alternating: |
    /hoge/ =~ str
    /huge/ =~ str
  vm_regexp_invert: |
    str =~ /hoge/
  vm_regexp_invert_alternating: |
    str =~ /hoge/
    str =~ /huge/
loop_count: 6000000