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Type:
Task
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Resolution: Done
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Priority:
Minor - P4
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Affects Version/s: None
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Component/s: None
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Labels:None
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Environment:Rubies:
ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux]
jruby 1.7.1 (1.9.3p327) 2012-12-03 30a153b on OpenJDK 64-Bit Server VM 1.7.0_09-b30 [linux-amd64]
Gems:
bson (1.8.0)
bson_ext (1.8.0)
bson (1.8.0 java)
I've tested bson gem performance on MRI & JRuby and I'm curious why C code performs slower than java?
Used contrived example:
require 'benchmark'
require 'active_support/time' # for Time.parse()
require 'bson'
h = {:_id=>"1-1651543736", :s_id=>23896626, :o_id=>1, :hash_code=>2074639573, :type=>0, :date_1=>Time.parse('2013-01-20 00:00:00 UTC'), :duration=>7, :s1=>2512.0, :s2=>2512.0, :cur=>2, :date_range=>[{:date=>{:from=>Time.parse('2013-01-20 00:00:00 UTC'), :to=>Time.parse('2013-01-27 00:00:00 UTC')}, :hash_code=>-344124839}], :extra_hashes=>["1-0-ce3a1ae5bf8c6936b168f7f7ef13500f", "1-0-d2c44ee305712dc61a1740ac30ace545"], :del=>[], :state=>1, :created_at=>Time.now.utc}
h_s = BSON.serialize h
Benchmark.bmbm do |x|
x.report('serialization') { 1000000.times {a = BSON.serialize h} }
x.report('deserialization') { 1000000.times {a = BSON.deserialize h_s} }
end
MRI results:
Rehearsal ---------------------------------------------------
serialization 37.110000 0.000000 37.110000 ( 37.158225)
deserialization 77.020000 2.200000 79.220000 ( 79.323779)
---------------------------------------- total: 116.330000sec
user system total real
serialization 37.520000 0.010000 37.530000 ( 37.573440)
deserialization 75.870000 2.420000 78.290000 ( 78.388029)
JRuby results:
Rehearsal ---------------------------------------------------
serialization 13.630000 0.070000 13.700000 ( 12.320000)
deserialization 25.850000 0.100000 25.950000 ( 23.235000)
----------------------------------------- total: 39.650000sec
user system total real
serialization 12.260000 0.000000 12.260000 ( 11.864000)
deserialization 24.040000 0.140000 24.180000 ( 22.598000)