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December 8, 2012 22:17
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benchmarking parallel gem with ruby 1.9.3, jruby 1.71 - process vs thread
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| require 'benchmark' | |
| require 'parallel' | |
| array = (1..100000).map { rand } | |
| Benchmark.bmbm do |x| | |
| x.report("sort!") { Parallel.map((0..20), :in_process=>8) { array.dup.sort! } } | |
| x.report("sort") { Parallel.map((0..20), :in_process=>8) { array.dup.sort! } } | |
| end |
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| ruby 1.9.3 | |
| Rehearsal ----------------------------------------- | |
| sort! 4.700000 0.150000 16.340000 ( 8.809903) | |
| sort 5.950000 0.160000 18.070000 ( 10.327694) | |
| ------------------------------- total: 34.410000sec | |
| user system total real | |
| sort! 4.670000 0.160000 16.740000 ( 9.057902) | |
| sort 4.630000 0.150000 16.540000 ( 8.920719) | |
| jruby 1.7.1 | |
| Rehearsal ----------------------------------------- | |
| sort! 1.990000 0.030000 2.020000 ( 1.036000) | |
| sort 1.370000 0.010000 1.380000 ( 0.713000) | |
| -------------------------------- total: 3.400000sec | |
| user system total real | |
| sort! 1.600000 0.100000 1.700000 ( 0.921000) | |
| sort 1.350000 0.010000 1.360000 ( 0.701000) | |
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| require 'benchmark' | |
| require 'parallel' | |
| array = (1..100000).map { rand } | |
| Benchmark.bmbm do |x| | |
| x.report("sort!") { Parallel.map((0..20), :in_threads=>8) { array.dup.sort! } } | |
| x.report("sort") { Parallel.map((0..20), :in_threads=>8) { array.dup.sort! } } | |
| end |
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in the process mode of ruby 1.9.3 the overhead is also for serializing the return data of forked process