Ruby Single VS Double Quotes

benchmark.rb

require 'benchmark/ips'

Benchmark.ips do |x|
  x.report('Single quotes')  { 'String of Characters' }
  x.report('Double Quotes')  { "String of Characters" }
  x.compare!
end

# Warming up --------------------------------------
#        Single quotes     1.745M i/100ms
#        Double Quotes     1.736M i/100ms
# Calculating -------------------------------------
#        Single quotes     17.583M (± 1.1%) i/s -     89.016M in   5.063070s
#        Double Quotes     17.241M (± 2.9%) i/s -     86.818M in   5.040132s
# 
# Comparison:
#        Single quotes: 17583468.6 i/s
#        Double Quotes: 17241297.9 i/s - same-ish: difference falls within error