gistfile1.rb

require 'benchmark'

def rc
  rand(127).chr
end

ITER = 1_000_000

puts "\n\n rb_format_str"
Benchmark.bm do | x|
  
  x.report do
    ITER.times do
      str = 'Some %s text %s and more %s text' % [rc, rc, rc]
    end
  end
end

puts "\n\n unshift"
Benchmark.bm do | x|
  
  x.report do
    ITER.times do
      str = 'Some ' << rc << ' text ' << rc << ' and more ' << rc << ' text'
    end
  end
end

puts "\n\n inline"
Benchmark.bm do | x|
  x.report do
    ITER.times do
      str = "Some #{rc} text #{rc} and more #{rc} text"
    end
  end
end