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| require "allocation_tracer" | |
| require "graphql" | |
| require "json" | |
| schema_defn = <<-GRAPHQL | |
| schema { | |
| query: Query | |
| } | |
| type Query { | |
| posts(limit: Int!): [Post] | |
| } | |
| type Post { | |
| id: Int! | |
| user: User! | |
| comments: [Comment!] | |
| stars: Int! | |
| } | |
| type Comment { | |
| id: Int! | |
| user: User! | |
| length: Int! | |
| stars: Int! | |
| } | |
| type User { | |
| id: Int! | |
| age: Int! | |
| } | |
| GRAPHQL | |
| class Query | |
| def self.posts(obj, args, ctx) | |
| args.limit.times.map do | |
| Post.new | |
| end | |
| end | |
| end | |
| class Post | |
| def self.id(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| def self.user(obj, args, ctx) | |
| User.new | |
| end | |
| def self.comments(obj, args, ctx) | |
| rand(1..42).times.map do | |
| Comment.new | |
| end | |
| end | |
| def self.stars(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| end | |
| class User | |
| def self.id(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| def self.age(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| end | |
| class Comment | |
| def self.id(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| def self.user(obj, args, ctx) | |
| User.new | |
| end | |
| def self.length(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| def self.stars(obj, args, ctx) | |
| rand(1..2**31) | |
| end | |
| end | |
| module ExecuteGraphQLByConvention | |
| module_function | |
| # Find a Ruby module corresponding to `type`, | |
| # then call its method corresponding to `field`. | |
| def call(type, field, obj, args, ctx) | |
| type_module = Object.const_get(type.name) | |
| type_module.public_send(field.name, obj, args, ctx) | |
| end | |
| end | |
| schema = GraphQL::Schema.from_definition(schema_defn, default_resolve: ExecuteGraphQLByConvention) | |
| query = <<-GRAPHQL | |
| query { | |
| posts(limit: 10000) { | |
| id | |
| user { | |
| id | |
| age | |
| } | |
| comments { | |
| id | |
| user { | |
| id | |
| age | |
| } | |
| length | |
| stars | |
| } | |
| stars | |
| } | |
| } | |
| GRAPHQL | |
| ObjectSpace::AllocationTracer.setup(%i{ path line type }) | |
| trace = ObjectSpace::AllocationTracer.trace do | |
| schema.execute(query, variables: { foo: 42 }, context: { bar: 42 }) | |
| end | |
| trace = trace.sort_by{ |info, counts| counts.first } | |
| trace.reverse! | |
| puts JSON.pretty_generate(trace.first(10)) |
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| Command being timed: "ruby allocation_test.rb" | |
| User time (seconds): 37.32 | |
| System time (seconds): 0.39 | |
| Percent of CPU this job got: 99% | |
| Elapsed (wall clock) time (h:mm:ss or m:ss): 0:37.72 | |
| Average shared text size (kbytes): 0 | |
| Average unshared data size (kbytes): 0 | |
| Average stack size (kbytes): 0 | |
| Average total size (kbytes): 0 | |
| Maximum resident set size (kbytes): 996616 | |
| Average resident set size (kbytes): 0 | |
| Major (requiring I/O) page faults: 0 | |
| Minor (reclaiming a frame) page faults: 285519 | |
| Voluntary context switches: 3 | |
| Involuntary context switches: 202 | |
| Swaps: 0 | |
| File system inputs: 0 | |
| File system outputs: 0 | |
| Socket messages sent: 0 | |
| Socket messages received: 0 | |
| Signals delivered: 0 | |
| Page size (bytes): 4096 | |
| Exit status: 0 |
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