Commits on Oct 26, 2017

1. Replace interpolated interpolation with cleaner method …

   In micro-benchmarking, this change performs within margin of error of
   the existing code but saves a string allocation each time the method is
   called (assuming the quote strings in the old code were frozen).
   
   ```
   begin
     require "bundler/inline"
   rescue LoadError => e
     $stderr.puts "Bundler version 1.10 or later is required. Please update
                   your Bundler"
     raise e
   end
   
   gemfile(true) do
     source "https://rubygems.org"
   
     gem "benchmark-ips"
   end
   
   def allocate_count
     GC.disable
     before = ObjectSpace.count_objects
     yield
     after = ObjectSpace.count_objects
     after.each { |k,v| after[k] = v - before[k] }
     after[:T_HASH] -= 1 # probe effect - we created the before hash.
     GC.enable
     result = after.reject { |k,v| v == 0 }
     GC.start
     result
   end
   
   interpolated = "hi"
   
     puts "'"' + interpolated + '"'"
     puts allocate_count { 1000.times { '"' + interpolated + '"' } }
     puts "%(\"\#{interpolated}\")"
     puts allocate_count { 1000.times { %("#{interpolated}") } }
     puts "\"\#{interpolated}\""
     puts allocate_count { 1000.times { "\"#{interpolated}\"" } }
   
   Benchmark.ips do |x|
     x.report("'"' + interpolated + '"'") { '"' + interpolated + '"' }
     x.report("%(\"\#{interpolated}\")")  { %("#{interpolated}") }
     x.report("\"\#{interpolated}\"")     { "\"#{interpolated}\"" }
     x.compare!
   end
   ```ruby
   
   ```
   ' + interpolated + '
   {:FREE=>-1892, :T_STRING=>2052}
   %("#{interpolated}")
   {:FREE=>-1001, :T_STRING=>1000}
   "#{interpolated}"
   {:FREE=>-1001, :T_STRING=>1000}
   Warming up --------------------------------------
   ' + interpolated + '    81.706k i/100ms
   %("#{interpolated}")   106.128k i/100ms
      "#{interpolated}"   137.855k i/100ms
   Calculating -------------------------------------
   ' + interpolated + '      3.892M (±23.2%) i/s -     17.975M in   5.007068s
   %("#{interpolated}")      3.722M (±17.3%) i/s -     17.830M in   5.022549s
      "#{interpolated}"      3.725M (±15.0%) i/s -     18.059M in   5.023493s
   
   Comparison:
   ' + interpolated + ':  3892392.6 i/s
      "#{interpolated}":  3725385.8 i/s - same-ish: difference falls within error
   %("#{interpolated}"):  3722401.7 i/s - same-ish: difference falls within error
   ```

   

   dillonwelch committed Oct 26, 2017
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