* lib/net/smtp.rb (Net::SMTP#data): enable buffering while

'data' send for optimizing Net::SMTP#send_message.
  [ruby-dev:48329] [misc #9981]
  patch by Masahiro Tomita.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46793 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Sat Jul 12 04:17:40 2014  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* lib/net/smtp.rb (Net::SMTP#data): enable buffering while
+	  'data' send for optimizing Net::SMTP#send_message.
+	  [ruby-dev:48329] [misc #9981]
+	  patch by Masahiro Tomita.
+
 Sat Jul 12 01:13:45 2014  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* test/ruby/envutil.rb (assert_no_memory_leak): On Solaris 9 or later,

lib/net/smtp.rb

@@ -901,10 +901,17 @@ module Net
       end
       res = critical {
         check_continue get_response('DATA')
-        if msgstr
-          @socket.write_message msgstr
-        else
-          @socket.write_message_by_block(&block)
+        socket_sync_bak = @socket.io.sync
+        begin
+          @socket.io.sync = false
+          if msgstr
+            @socket.write_message msgstr
+          else
+            @socket.write_message_by_block(&block)
+          end
+        ensure
+          @socket.io.flush
+          @socket.io.sync = socket_sync_bak
         end
         recv_response()
       }