From 48ba7c7bb0ccf146921e585c6ce2f5a0e1afff0f Mon Sep 17 00:00:00 2001
From: take-cheeze <takechi101010@gmail.com>
Date: Fri, 22 Jun 2018 11:41:12 +0900
Subject: Increase sleep duration exponentially instead of `Thread.pass`.

---
 minirake | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/minirake b/minirake
index e16dd5bcf..8b6bfa296 100755
--- a/minirake
+++ b/minirake
@@ -562,8 +562,9 @@ class RakeApp
     exit 1
   end
 
-  def wait_process
-    Thread.pass
+  def wait_process(count = 0)
+    dur = [0.0001 * (10 ** count), 1].min
+    sleep dur
 
     exited = []
     $rake_fiber_table.each do |pid, v|
@@ -581,10 +582,12 @@ class RakeApp
         raise "Command Failed: [#{ent[:command]}]"
       end
 
-      wait_process while $rake_fiber_table.size >= $rake_jobs
+      fail 'task scheduling bug!' if $rake_fiber_table.size >= $rake_jobs
 
       ent[:fiber].transfer
     end
+
+    wait_process(count + 1) if !$rake_fiber_table.empty? && exited.empty?
   end
 
   end
-- 
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