timing two different crystal implementations of String#blank?

blank.cr

# crystal version: 0.17.4
struct Char
  def blank?
    case ord
    when 9, 0xa, 0xb, 0xc, 0xd, 0x20, 0x85, 0xa0, 0x1680, 0x180e,
          0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006,
          0x2007, 0x2008, 0x2009, 0x200a, 0x2028, 0x2029, 0x202f,
          0x205f, 0x3000 then true
    else
      false
    end
  end
end
class String

  BLANK_RE = /\A[[:space:]]*\z/

  # A string is blank if it's empty or contains whitespaces only:
  #
  #   ''.blank?       # => true
  #   '   '.blank?    # => true
  #   "\t\n\r".blank? # => true
  #   ' blah '.blank? # => false
  #
  # Unicode whitespace is supported:
  #
  #   "\u00a0".blank? # => true
  #
  # @return [true, false]
  def blank_old?
    # The regexp that matches blank strings is expensive. For the case of empty
    # strings we can speed up this method (~3.5x) with an empty? call. The
    # penalty for the rest of strings is marginal.
    empty? || BLANK_RE === self
  end
  def blank?
    empty? || each_char.all? &.blank?
  end
end


puts "timing blank methods"
count = 50_000_000
strings = ["#{0xa0.chr}", "\t\n", " ", "a", "a ", ""]

strings.each do |str|
  t1 = Time.now
  count.times do |i|
    " ".blank_old?
  end
  t2 = Time.now
  count.times do |i|
    " ".blank?
  end
  t3 = Time.now

  puts "---- #{str.inspect} ----"
  puts "time old: #{t2 - t1}"
  puts "time new: #{t3 - t2}"
  
end

results.txt

# crystal version: 0.17.4
---- " " ----
time old: 00:00:12.0384530
time new: 00:00:12.4862200
---- "\t\n" ----
time old: 00:00:12.1807940
time new: 00:00:12.6070700
---- " " ----
time old: 00:00:12.2025870
time new: 00:00:12.5745790
---- "a" ----
time old: 00:00:11.9885690
time new: 00:00:12.7635750
---- "a " ----
time old: 00:00:12.1138550
time new: 00:00:12.7864930
---- "" ----
time old: 00:00:11.9982170
time new: 00:00:12.5567060