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https://issues.apache.org/jira/browse/JAMES-2343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16461851#comment-16461851
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ASF GitHub Bot commented on JAMES-2343:
---------------------------------------
Github user chibenwa commented on a diff in the pull request:
https://github.com/apache/james-project/pull/105#discussion_r185686831
--- Diff:
server/container/core/src/main/java/org/apache/james/server/core/BufferedDeferredFileOutputStream.java
---
@@ -0,0 +1,251 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.james.server.core;
+
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.io.output.ByteArrayOutputStream;
+import org.apache.commons.io.output.DeferredFileOutputStream;
+import org.apache.commons.io.output.ThresholdingOutputStream;
+
+/**
+ * An almost copy of {@link DeferredFileOutputStream} with buffered file
stream.
--- End diff --
Also can you clearly highlight what the differences are? (Which method,
etc...) This will make updating that class easier.
> Use buffered file output stream for MimeMessageInputStreamSource
> ----------------------------------------------------------------
>
> Key: JAMES-2343
> URL: https://issues.apache.org/jira/browse/JAMES-2343
> Project: James Server
> Issue Type: Improvement
> Components: James Core
> Reporter: TzeKai Lee
> Priority: Major
>
> Currently MimeMessageInputStreamSource use DeferredFileOutputStream from
> commons-io which does _not_ buffer output stream when switched to
> FileOutputStream. In my preliminary test, simply wrap FileOutputStream with
> BufferedOutputStream could make a 50% performance improvement for mail larger
> than deferring threshold (currently 100kb).
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