Le point sur l'interpolation

gistfile1.txt

require 'benchmark'
n = 1000000
m = n.to_s

Benchmark.bm do |x|
  x.report("assign single") { n.times do; c = 'a string'; end}
  x.report("assign double") { n.times do; c = "a string"; end}
  x.report("assign interp") { n.times do; c = "a #{n} string"; end}
  x.report("concat single") { n.times do; 'a ' + n.to_s + ' string b ' + n.to_s + ' string'; end}
  x.report("concat double") { n.times do; "a " + n.to_s + " string b " + n.to_s + " string"; end}
  x.report("concat interp") { n.times do; "a #{n} string b #{n} string"; end}
  x.report("single optim") { n.times do; 'a ' + m + ' string b ' + m + ' string'; end}
  x.report("double optim") { n.times do; "a " + m + " string b " + m + " string"; end}
  x.report("interp optim") { n.times do; "a #{m} string b #{m} string"; end}
end

============= Results

[~/Desktop]$ ruby quotes_and_string_love.rb                               [ruby-1.9.3-p125] 
       user     system      total        real
assign single  0.130000   0.000000   0.130000 (  0.128500)
assign double  0.120000   0.000000   0.120000 (  0.127298)
assign interp  0.510000   0.000000   0.510000 (  0.502982)
concat single  1.520000   0.000000   1.520000 (  1.520487)
concat double  1.520000   0.000000   1.520000 (  1.520864)
concat interp  1.140000   0.000000   1.140000 (  1.146863)
single optim  1.140000   0.000000   1.140000 (  1.141740)
double optim  1.150000   0.000000   1.150000 (  1.150964)
interp optim  0.760000   0.000000   0.760000 (  0.752978)