Very Basic benchmark use example to clarify results

gistfile1.txt

require 'benchmark'
require 'benchmark/ips'

Benchmark.ips do |r|
  N = 100000

  r.report("<< ") do
    s = ""
    N.times { s << "." }
  end


  r.report("<< many") do
    s = ""
    N.times { s << "." << "."  << "."  << "."  << "." << "." << "."  }
  end
end

Calculating -------------------------------------
                 <<          4 i/100ms
             << many         1 i/100ms
-------------------------------------------------
                 <<        41.7 (±2.4%) i/s -        212 in   5.090942s
             << many        8.2 (±0.0%) i/s -         41 in   5.032027s
 => [                 <<        41.7 (±2.4%) i/s -        212 in   5.090942s,              << many        8.2 (±0.0%) i/s -         41 in   5.032027s]