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k-tsj/gist:3992cdea44bcfbe253bc

Created August 25, 2015 14:19
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gistfile1.txt
ruby -v -rstringio -rbenchmark -e 'N=1_000_000;Benchmark.bm(5){|x| x.report("String#<<"){s="";N.times{s<<"a"}}; x.report("Array#<<+join"){a=[];N.times{a<<"a"};a.join}; x.report("StringIO#<<"){i=StringIO.new;N.times{i<<"a"};i.to_s}};'
ruby 2.2.3p173 (2015-08-18 revision 51636) [x86_64-linux]
user system total real
String#<< 0.150000 0.000000 0.150000 ( 0.149649)
Array#<<+join 0.200000 0.030000 0.230000 ( 0.231170)
StringIO#<< 0.250000 0.010000 0.260000 ( 0.255604)
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