Benchmark: String Interpolation vs Concatenation

benchmark.rb

require 'benchmark'
  
n = 100_000
 
Benchmark.bm(10) do |bm|
  bm.report('interpolation') { n.times { "#{ 1 }/#{ 2 }" } }
  bm.report('concatenation') { n.times { 1.to_s + '/' + 2.to_s } }
end

results.txt

                 user     system      total        real
interpolation  0.050000   0.000000   0.050000 (  0.045237)
concatenation  0.060000   0.000000   0.060000 (  0.058181)