Delay with no constructor options now uses ImmediateExecutor.

Author: jdantonio

lib/concurrent/configuration.rb

@@ -44,6 +44,9 @@ module Concurrent
   end
   private_constant :GLOBAL_TIMER_SET
 
+  # @!visibility private
+  GLOBAL_IMMEDIATE_EXECUTOR = ImmediateExecutor.new
+
   def self.global_logger
     GLOBAL_LOGGER.value
   end

lib/concurrent/delay.rb

@@ -2,6 +2,7 @@
 require 'concurrent/configuration'
 require 'concurrent/obligation'
 require 'concurrent/executor/executor_options'
+require 'concurrent/executor/immediate_executor'
 
 module Concurrent
 
@@ -56,7 +57,7 @@ def initialize(opts = {}, &block)
       @state = :pending
       @task  = block
       set_deref_options(opts)
-      @task_executor = get_executor_from(opts) || Concurrent.global_io_executor
+      @task_executor = get_executor_from(opts) || Concurrent::GLOBAL_IMMEDIATE_EXECUTOR
       @computing     = false
     end
 

spec/concurrent/delay_spec.rb

@@ -22,16 +22,16 @@ def dereferenceable_subject(value, opts = {})
       let!(:rejected_reason) { StandardError.new('mojo jojo') }
 
       let(:pending_subject) do
-        Delay.new{ sleep 0.05; fulfilled_value }
+        Delay.new(executor: :fast){ sleep 0.05; fulfilled_value }
       end
 
       let(:fulfilled_subject) do
-        delay = Delay.new{ fulfilled_value }
+        delay = Delay.new(executor: :fast){ fulfilled_value }
         delay.tap{ delay.value }
       end
 
       let(:rejected_subject) do
-        delay = Delay.new{ raise rejected_reason }
+        delay = Delay.new(executor: :fast){ raise rejected_reason }
         delay.tap{ delay.value }
       end