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Posted by Nate Murray - Aug 13, 2008

String interpolation is faster than printf in Ruby

Just wanted to make a note, string interpolation is faster than printf in Ruby. Example:

$ irb
>> require 'benchmark'
=> true
>> Benchmark.measure { 100000.times {
  "%s" % ["hello world"] } }.total
=> 0.21
>> Benchmark.measure { 100000.times {
  "#{'hello world'}"} }.total
=> 0.04
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