Tunando o seu código Ruby

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André Luís @ndrluis

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VAMOS FALAR DE COISA BOA?

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RUBY É LENTO?

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RAILS É LENTO?

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TUNAR GC É NECESSARIO?

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http://helabs.com/blog/2014/12/19/ruby-gc-tuning-parameters/ http://www.akitaonrails.com/2015/03/27/small-bites-novidades-no- garbage-collector-do-ruby-2-2-1#.VYTSx2DrdBU http://www.infoq.com/br/presentations/entendendo-garbage- collector-ruby

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APRENDA A MENSURAR

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https://github.com/schneems/derailed_benchmarks Richard Schneeman

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$ derailed bundle:mem TOP: 87.5938 mb carrierwave: 35.9023 mb carrierwave/storage: 27.2773 mb fog: 27.125 mb fog/joyent: 5.2266 mb fog/joyent/compute: 5.1641 mb net/ssh: 4.9297 mb net/ssh/transport/session: 2.5977 mb net/ssh/transport/algorithms: 1.7188 mb net/ssh/transport/kex: 0.4375 mb net/ssh/transport/hmac: 0.375 mb net/ssh/transport/packet_stream: 0.5078 mb net/ssh/authentication/session: 1.0508 mb net/ssh/authentication/key_manager: 0.5039 mb net/ssh/connection/session: 0.9531 mb net/ssh/connection/channel: 0.3203 mb

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refile/rails: 0.9688 mb refile: 0.9688 mb rest_client: 0.6367 mb /Users/…/lib/restclient: 0.6367 mb /Users/…/lib/restclient/abstract_response: 0.4844 mb http-cookie: 0.4844 mb http/cookie: 0.4805 mb domain_name: 0.3984 mb domain_name/etld_data: 0.3789 mb

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$ derailed bundle:objects allocated objects by gem ----------------------------------- 281 reﬁle-0.5.5 2499 carrierwave-0.10.0

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$ derailed bundle:mem TOP: 89.2617 mb activeadmin: 24.1797 mb active_admin: 24.1797 mb ransack: 6.9805 mb ransack/adapters/active_record: 3.0039 mb action_view/view_paths: 0.6992 mb action_view/base: 0.6328 mb ransack/search: 0.4063 mb action_dispatch/http/request: 0.3828 mb active_admin/batch_actions: 4.0039 mb

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Reﬁle > Carrierwave RailsAdmin > ActiveAdmin

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NÃO NECESSARIAMENTE

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refile/rails: 2.3555 mb refile: 2.2539 mb rest_client: 1.7109 mb

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LOGO…..

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SABER MENSURAR É IMPORTANTE

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Benchmark

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benchmark-ips https://github.com/evanphx/benchmark-ips

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slow 47524.3 (± 7.6%) i/s fast 56823.2 (± 7.2%) i/s 20% mais rapido

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CUIDADO COM OPTIMIZAÇÃO PREMATURA!

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CRIE MENOS OBJETOS!

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Obrigado!