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Bug #19853 » fiber_bug.rb

Script to replicate this problem - rmosolgo (Robert Mosolgo), 08/28/2023 04:05 PM

 
require "bundler/inline"

gemfile do
gem "graphql", github: "rmosolgo/graphql-ruby", ref: "fiber_scheduler-compat"
gem "async"
end

class MySchema < GraphQL::Schema
class Query < GraphQL::Schema::Object
field :value, Float

def value
duration = [0.1, 0.3, 0.5].sample
system("sleep #{duration}")
duration
end
end

query(Query)
use GraphQL::Dataloader, nonblocking: true, fiber_control_mode: :transfer
end

start = Time.now
puts "Starting..."
Fiber.set_scheduler(Async::Scheduler.new)
pp MySchema.execute("{ v1: value v2: value }").to_h
puts "Ended"
pp [:duration, Time.now - start]
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