2013-04-26 12:00:03 -04:00
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# Ruby 2.0 slowness with big concurrency
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To reproduce:
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2013-04-26 12:02:07 -04:00
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Install redis locally and checkout the Sidekiq repo:
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2013-04-26 12:00:03 -04:00
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```
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git clone git://github.com/mperham/sidekiq
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cd sidekiq/myapp
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bundle
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```
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2013-04-26 12:02:07 -04:00
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Load lots of jobs into Redis, you can edit Rakefile to change the job
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count:
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2013-04-26 12:00:03 -04:00
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```
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> time bundle exec rake load_jobs
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2013-04-26T15:32:37Z 66670 TID-ov6pgqt3k INFO: Sidekiq client using redis://localhost:6379/0 with options {:size=>2, :namespace=>"foo"}
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real 0m49.206s
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user 0m45.037s
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sys 0m3.558s
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```
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2013-04-26 12:02:07 -04:00
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Start Sidekiq with 200 worker threads to process those jobs. You will need to kill Sidekiq with Ctrl-C as soon as log messages stop flying by.
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2013-04-26 12:00:03 -04:00
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```
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> time bundle exec sidekiq -c 200
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...
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2013-04-26T15:46:25Z 67059 TID-ovwfo7krk EmptyWorker JID-cce0eed5ea7281b720841ecc INFO: done: 0.224 sec
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2013-04-26T15:46:25Z 67059 TID-ovwfojqdg EmptyWorker JID-850c242ec75de77400838fa9 INFO: done: 0.231 sec
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2013-04-26T15:46:25Z 67059 TID-ovwfo6u94 EmptyWorker JID-fd2422116a771dc67a848489 INFO: done: 0.223 sec
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2013-04-26T15:46:25Z 67059 TID-ovwfo94ag EmptyWorker JID-45ecb59a43e62ebb574ee0da INFO: done: 0.223 sec
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2013-04-26T15:46:25Z 67059 TID-ovwfonv7s EmptyWorker JID-c7beabde4c0141b0669c4baf INFO: done: 0.221 sec
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^C2013-04-26T15:46:27Z 67059 TID-ovwfalyvw INFO: Shutting down
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2013-04-26T15:46:27Z 67059 TID-ovwfefrzw INFO: Shutting down 200 quiet workers
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real 3m37.921s
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user 3m3.110s
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sys 1m4.783s
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2013-04-26 12:02:07 -04:00
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> ruby -v
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ruby 1.9.3p374 (2013-01-15 revision 38858) [x86_64-darwin12.3.0]
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2013-04-26 12:00:03 -04:00
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```
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2013-04-26 12:02:07 -04:00
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Now try with various Rubies to see how your choice in VM performs.
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```
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2013-04-26T15:57:04Z 67357 TID-ow0muevo8 EmptyWorker JID-cb03f00310af3590009b19fe INFO: done: 0.189 sec
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2013-04-26T15:57:04Z 67357 TID-ow0muqgxc EmptyWorker JID-89710c72bf4a343834833bc4 INFO: done: 0.19 sec
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2013-04-26T15:57:04Z 67357 TID-ow0ms6rc4 EmptyWorker JID-bb358d8d8f02af9734b8a3ff INFO: done: 0.186 sec
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2013-04-26T15:57:04Z 67357 TID-ow0mwn908 EmptyWorker JID-7c032c55e6ab9a63dc31f175 INFO: done: 0.188 sec
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2013-04-26T15:57:04Z 67357 TID-ow0mv6m80 EmptyWorker JID-73dc04f9e431ebf433707d02 INFO: done: 0.188 sec
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^C2013-04-26T15:57:11Z 67357 TID-ow0m8kxh4 INFO: Shutting down
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2013-04-26T15:57:11Z 67357 TID-ow0mwqr20 INFO: Shutting down 200 quiet workers
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real 5m55.033s
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user 5m6.156s
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sys 1m4.886s
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> ruby -v
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ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin12.3.0]
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```
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