字符串拼接

string_link.rb

require 'benchmark'

iterations = 10_000_000
a = "hub"
b = "git"

Benchmark.bm do |bm|
  bm.report do
    iterations.times do
      ["I'm", a, b].join(" ")
    end
  end

  bm.report do
    iterations.times do
      "I'm #{a}#{b}"
    end
  end

  bm.report do
    iterations.times do
      "I'm #{a + b}"
    end
  end
end


# Result
#       user     system      total        real
#  11.080000   0.030000  11.110000 ( 11.191327)
#   3.150000   0.010000   3.160000 (  3.172435)
#   3.630000   0.010000   3.640000 (  3.649727)