Rails JSON APIとサービス高速化 / JSON Serializer 2020

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+40/"1*ͱ αʔϏεߴ଎Խ

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ࣗݾ঺հ w 5XJUUFS!MOJ@5  (JUIVC!MOJU w .FE1FFS&OHJOFFS ʙ w ޷͖ͳ3BJMTͷϝιου  QSFTFODF w ݏ͍ͳ3BJMTͷϝιου  BDDFQUT@OFTUFE@BUUSJCVUFT@GPS

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ΫϦχοΫ։ۀࢧԉ ϓϥοτϑΥʔϜ

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෺݅୳͠ ϊ΢ϋ΢ऩू

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ͭͬͨ͘ػೳ (PPHMF.BQ্Ͱ ෺݅୳͠ ڝ߹ͷఁ࡯ ױऀ਺༧ଌ ͕ͻͱ໨Ͱ෼͔Δ΍ͭ

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ϦϦʔεޙʹ໰୊͕

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ͱͯ΋஗͍

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ද͕ࣔ஗͍ ݕࡧ͔ͯ͠Β෺݅Λදࣔ͢Δ·Ͱʜ ඵʙඵ

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෺݅୳͠αʔϏε ͳͷʹ ୳͢ͷ͕஗͍ʂ

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+40/"1*Λ଎͘ʂ ˢຊ೔ͷςʔϚ

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ݪҼ͸ʁ

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୹བྷతࢥߟ ฦ٫͢Δ݅਺ʹൺྫͯ͠ύϑΥʔϚϯεѱԽ

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୹བྷతࢥߟ ฦ٫͢Δ݅਺ʹൺྫͯ͠ύϑΥʔϚϯεѱԽ ύϑΥʔϚϯε໰୊ͱ͍͑͹%# Ͱ ͑ ΂ ͑

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୹བྷతࢥߟ %#पΓͷΑ͋͘ΔରԠΛ΍ͬͯ΋Βͬͨ JOEFYுΔ /ͳ͘͢

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ղܾʂ ΊͰͨ͠ʁ

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ղܾ͠ͳ͔ͬͨ ෺݅"1* վળલ վળޙ

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ͱͯ΋஗͍ˠ஗͍ ඵˠඵ

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ϘτϧωοΫ୳͠ %#͡Όͳ͍ͳΒʜ Completed 200 OK in 2199ms (Views: 2127.1ms | ActiveRecord: 51.2ms) Completed 200 OK in 2300ms (Views: 2200.7ms | ActiveRecord: 67.0ms)

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ϘτϧωοΫ୳͠ 7JFXT͕஗͍ʂ KTPOͷϨϯμϦϯά෦෼ʁ (Views: 2127.1ms | ActiveRecord: 51.2ms) (Views: 2200.7ms | ActiveRecord: 67.0ms)

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+40/γϦΞϥΠζ ͳΜͱ͔͢Δ

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+40/γϦΞϥΠζ ʮ"DUJWF.PEFM4FSJBMJ[FSTʯΛར༻͍ͯͨ͠ ࿝ฮHFNͰ࢖͍΍͍͢ ύϑΥʔϚϯε໘ͰଞHFNͱൺֱ͞Ε͕ͪ KCVJMEFSΑΓ͸଎͍ͷ͕ͩʜ

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৐Γ׵͑ʂ

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ͦ΋ͦ΋ +40/γϦΞϥΠβ Կ࢖͑͹͍͍ʁ໰୊

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ௐࠪ

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ଟछଟ༷ͳબ୒ࢶ

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No content

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+40/γϦΞϥΠβ ઓࠃ࣌୅

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ൺֱ

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ൺֱ ൺֱର৅ KCVJMEFS "DUJWF.PEFM4FSJBMJ[FST ".4 GBTU@KTPOBQJ KC

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KCVJMEFS # app/views/messages/show.json.jbuilder json.content format_content(@message.content) json.(@message, :created_at, :updated_at) json.author do json.name @message.creator.name.familiar json.email_address @message.creator.email_address_with_name json.url url_for(@message.creator, format: :json) end json.comments @message.comments, :content, :created_at

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KCVJMEFS (PPE 3BJMTσϑΥϧτ౥ࡌ ৽نϝϯόͷֶशίετ௿ ϝϯς͞Ε͍ͯΔ 3BJMTίΞνʔϜ ೚ҙͷεΩʔϚͰฦ٫Ͱ͖Δ #BE ௿଎ʜ ಠಛͳه๏͕ͳ͡·ͳ͍ਓ΋ଟ͍ 0UIFS (*U)VCελʔ਺L

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".4 class PostSerializer < ActiveModel::Serializer attributes :title, :body has_many :comments has_one :author end class CommentSerializer < ActiveModel::Serializer attributes :name, :body belongs_to :post end

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".4 (PPE 4FSJBMJ[FSΫϥεͷ࣮૷ςετ͕Մೳ ೚ҙͷεΩʔϚͰฦ٫Ͱ͖Δ #BE ϝϯςφϯε͞Ε͍ͯͳ͍ 0UIFS KCVJMEFSΑΓ͸଎͍͕ଞHFNͱൺֱ͢Δͱ஗͍ (JU)VCελʔ਺L

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GBTU@KTPOBQJ class MovieSerializer include FastJsonapi::ObjectSerializer attributes :name, :year has_many :actors belongs_to :owner, record_type: :user belongs_to :movie_type end json_string = MovieSerializer.new(movie).serialized_json

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GBTU@KTPOBQJ (PPE 4FSJBMJ[FSΫϥεͷ࣮૷ςετ͕Մೳ ߴ଎ʂ #BE ϝϯςφϯε͞Ε͍ͯͳ͍ ˞ຊՈ͔Β'PSL͞ΕͨϦϙδτϦͰϝϯς͞ΕͯΔ 0UIFS εΩʔϚ͕+40/"1*ʹݶఆ͞ΕΔ (JU)VCελʔ਺L

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GBTU@KTPOBQJ +40/"1* +40/ߏ଄ͷن໿ UZQF JEඞਢ ΞιγΤʔγϣϯ͸  SFMBUJPOTIJQT   JODMVEFE  Ͱදݱ͢Δ { "data": [{ "type": "articles", "id": "1", "attributes": { "title": "JSON:API paints my bikeshed!" }, "relationships": { "author": { "data": { "type": "people", "id": "9" } }, }, }], "included": [{ "type": "people", "id": "9", "attributes": { "firstName": "Dan", "lastName": "Gebhardt", }, }] }

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KC # app/views/messages/show.json.jb json = { content: format_content(@message.content), created_at: @message.created_at, updated_at: @message.updated_at, author: { name: @message.creator.name.familiar, email_address: @message.creator.email_address_with_name, url: url_for(@message.creator, format: :json) } } json[:comments] = @message.comments.map do |comment| { content: comment.content, created_at: comment.created_at } end json

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KC (PPE KCVJMEFSΑΓૉ௚ʹ3VCZͬΆ͘ॻ͚Δ ߴ଎ʂ ೚ҙͷεΩʔϚͰฦ٫Ͱ͖Δ ϝϯςφϯε͞Ε͍ͯΔ #BE ʮ4FSJBMJ[FSͷςετॻ͖͍ͨʂʯਓ͸߹Θͳ͍͔΋ 3FRVFTU4QFD4ZTUFN4QFDͰॻ͘͜ͱʹͳΔ 0UIFS (JU)VCελʔ਺

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KCVJMEFS ".4 GBTU@ KTPOBQJ KC ଎౓ º ˓ ˕ ˕ εΩʔϚ ࣗ༝౓ ˓ ˓ ˚ ˓ ςετ ͠΍͢͞ ˚ ˓ ˓ ˚ HFN ϝϯς ˕ º ˚ ˓ ˞ݸਓͷײ૝Ͱ͢

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ɾТɾʆ Ͳ͏͠Α͏

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ࠓճ͸଎౓͕໰୊ͳͷͰ ϕϯνϚʔΫ ΈΜͳ͍͖ͩ͢ CFODINBSLJQT

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CFODINBSLJQT def benchmark Benchmark.ips do |x| x.report('ams') do render_to_string json: ams_tenants, serializer: Ams::TenantSerializer end x.report('fast_jsonapi') do json = FastJsonapi::TenantSerializer.new(tenants).serialized_json render_to_string json: json end x.report('jb') do render_to_string 'index' end x.compare! end end

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CFODINBSLJQT ".4ˠGBTU@KTPOBQJ΍KCʹ৐Γ׵͑Δ͚ͩͰʜ ഒ଎ݟࠐΈʂ˞EFWFMPQNFOU؀ڥଌఆ Αͦ͞͏ʂ Comparison: jb: 2.0 i/s fast_jsonapi: 1.8 i/s - 1.10x (± 0.00) slower ams: 1.2 i/s - 1.64x (± 0.00) slower

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৐Γ׵͑ Ұ෦"1*ͷʮKCʯ΁ͷ৐Γ׵͑Λબ୒ બఆཧ༝ ߴ଎ ೚ҙͷεΩʔϚͰฦ٫Ͱ͖Δ +4ଆ΋࣮૷ࡁͷͨΊεΩʔϚมߋ͸΍Γͨ͘ͳ͍

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ຊ൪ϦϦʔε݁Ռ

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TҎ಺౸ୡʂ "status":200,"duration":449.96,"view":299.48,"db":97.36

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TҎ಺౸ୡʂ ෺݅"1* վળલ վળͦͷ վળͦͷ

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ΊͰͨ͠

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·ͱΊ

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֤HFNͷॴײ KCVJMEFS ඪ४౥ࡌ͕ڧΈ ֶशίετɺϝϯςφϯεܧଓੑ ։ൃίετॏࢹ଎౓ʹ໰୊͕ແ͍৔߹ʹ͓͢͢Ί ࠓޙ৽ͨͳ৐Γ׵͑ઌ͕ݟ͔ͭΔʜ͔΋ʁ "DUJWF.PEFM4FSJBMJ[FST ͳΜ͔ͩΜͩ࢖͍΍͍͢ ϝϯς͞Εͯͳ͍ͷ͕ਏ͍ʜ ࠓ࢖͍͑ͯΔਓ͸ɺ  ٸ͗৐Γ׵͑ͳͯ͘΋Αͦ͞͏

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֤HFNͷॴײ GBTU@KTPOBQJ ଎౓ॏࢹͷ৔߹ʹ͓͢͢Ί +40/"1*ͷ੍໿Λڐ༰Ͱ͖ΔͳΒ͹࢖͍΍͍͢ ˞ύονͰಈ࡞Λվม͢Δཪٕ΋ KC ଎౓ॏࢹͷ৔߹ʹ͓͢͢Ί 7JFXʹ௨ৗͷSVCZͬΆ͘ॻ͘ه๏͕߹͑͹࢖͍΍͍͢

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·ͱΊ ϘτϧωοΫ͸ͭͱ͸ݶΒͳ͍ͷͰࠜؾΑ͘վળ͠Α͏ ϓϩμΫτͷ໰୊ɺϏδωεͷঢ়گΛؑΈͯ  ͦͷ࣌ʑʹ߹ٕͬͨज़બఆΛ͠Α͏ ͲͷΞϓϦʹ΋߹͏+40/γϦΞϥΠβͷܾఆ൛͸  ೥ݱࡏܾΊΒΕͳͦ͞͏

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KCVJMEFS ".4 GBTU@ KTPOBQJ KC ଎౓ º ˓ ˕ ˕ εΩʔϚ ࣗ༝౓ ˓ ˓ ˚ ˓ ςετ ͠΍͢͞ ˚ ˓ ˓ ˚ HFN ϝϯςφ ˕ º ˚ ˓