(Performance) JRuby is 10x slower than MRI on Time objects creation
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Key: JRUBY-1660
URL: http://jira.codehaus.org/browse/JRUBY-1660
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Environment: JRuby 1.1b1, latest trunk
Reporter: Vladimir Sizikov
Attachments: bench_time_create.rb, ruby_time_creation_times.png
The attached benchmark (bench_time_create.rb) shows that JRuby is much slower
than MRI:
JRuby:
#>jruby -J-server bench_time_create.rb
Loaded suite bench_time_create
Started
Time.at_1000000
6.572000 0.000000 6.572000 ( 6.572000)
5.687000 0.000000 5.687000 ( 5.687000)
5.254000 0.000000 5.254000 ( 5.254000)
5.496000 0.000000 5.496000 ( 5.496000)
4.741000 0.000000 4.741000 ( 4.741000)
.Time.at_10000000
50.130000 0.000000 50.130000 ( 50.130000)
50.666000 0.000000 50.666000 ( 50.666000)
49.087000 0.000000 49.087000 ( 49.086000)
52.064000 0.000000 52.064000 ( 52.064000)
50.016000 0.000000 50.016000 ( 50.016000)
.
Finished in 279.735 seconds.
MRI:
#>ruby bench_time_create.rb
Loaded suite bench_time_create
Started
Time.at_1000000
0.600000 0.110000 0.710000 ( 0.708770)
0.560000 0.090000 0.650000 ( 0.654781)
0.590000 0.080000 0.670000 ( 0.663018)
0.560000 0.100000 0.660000 ( 0.663717)
0.640000 0.090000 0.730000 ( 0.726604)
.Time.at_10000000
6.190000 0.900000 7.090000 ( 7.108947)
5.770000 0.820000 6.590000 ( 6.627773)
5.800000 0.730000 6.530000 ( 6.558091)
5.780000 0.820000 6.600000 ( 6.624010)
6.190000 0.910000 7.100000 ( 7.124799)
.
Finished in 37.466152 seconds.
Take a look at the attached image for profile info. Most of the time JRuby
spends in getLocalTimeZone() method.
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