Don't use StringIO in benchmarks #162
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StringIO seems to be absurdly slow, on the order of ten times slower than writing to a real IO (e.g. a file). Writing the output to the null device (/dev/null on Linux, NUL on Windows, etc.) should be much more reasonable for performance comparison. Results from `benchmark/encode.rb` on my machine, using `StringIO.new` and `File.open(File::NULL, 'w')`: | | StringIO | Null device | | ------------------------------------ | --------- | ----------- | | Yajl::Encoder#encode (to an IO) | 3.085176 | 0.683039 | | Yajl::Encoder#encode (to a String) | 0.526030 | 0.544032 | | JSON.generate | 1.380079 | 1.432082 | | Psych.to_json | 10.271588 | 10.016573 | | Psych::JSON::Stream | 9.238529 | 4.949283 | | ActiveSupport::JSON.encode | 10.817619 | 10.233585 |
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StringIO seems to be absurdly slow, on the order of ten times slower
than writing to a real IO (e.g. a file). Writing the output to the
null device (/dev/null on Linux, NUL on Windows, etc.) should be much more
reasonable for performance comparison.
Results from
benchmark/encode.rbon my machine, usingStringIO.newand
File.open(File::NULL, 'w'):