From a8a74995bf137adc0babb81f70a4cd86213d7591 Mon Sep 17 00:00:00 2001
From: Chris Eppstein <chris@eppsteins.net>
Date: Fri, 22 Apr 2011 09:19:32 -0700
Subject: [PATCH] A module to help debug memory leaks in the watcher.

---
 lib/compass/commands/watch_project.rb | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/lib/compass/commands/watch_project.rb b/lib/compass/commands/watch_project.rb
index fea0cfb4..668b6b81 100644
--- a/lib/compass/commands/watch_project.rb
+++ b/lib/compass/commands/watch_project.rb
@@ -24,12 +24,37 @@ module Compass
 
       end
     end
+    module MemoryDebugger
+      def report_on_instances(type, options = {})
+        @@runs ||= 0
+        @@runs += 1
+        @@object_id_tracker ||= {}
+        @@object_id_tracker[type] ||= []
+        GC.start
+        sleep options.fetch(:gc_pause, 1)
+        count = ObjectSpace.each_object(type) do |obj|
+          if @@runs > 2
+            if options.fetch(:verbose, true) && !@@object_id_tracker[type].include?(obj.object_id)
+              begin
+                puts obj.inspect
+              rescue
+              end
+              puts "#{obj.class.name}:#{obj.object_id}"
+            end
+          end
+          @@object_id_tracker[type] << obj.object_id
+        end
+        puts "#{type}: #{count} instances."
+      end
+    end
     class WatchProject < UpdateProject
 
       register :watch
 
       attr_accessor :last_update_time, :last_sass_files
 
+      include MemoryDebugger
+
       def perform
         Signal.trap("INT") do
           puts ""
@@ -116,6 +141,7 @@ module Compass
           begin
             puts ">>> Change detected to: #{file}"
             compiler.run
+            # report_on_instances(Sass::Importers::Base, :verbose => false)
           rescue StandardError => e
             ::Compass::Exec::Helpers.report_error(e, options)
           end