diff --git a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/AddCommandTest.java b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/AddCommandTest.java
index 632288ec6..2fb228e01 100644
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/AddCommandTest.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/AddCommandTest.java
@@ -111,7 +111,7 @@ public class AddCommandTest extends RepositoryTestCase {
 	}
 
 	@Test
-	public void testAddExistingSingleFileWithNewLine() throws IOException,
+	public void testAddExistingSingleSmallFileWithNewLine() throws IOException,
 			NoFilepatternException {
 		File file = new File(db.getWorkTree(), "a.txt");
 		FileUtils.createNewFile(file);
@@ -134,6 +134,35 @@ public class AddCommandTest extends RepositoryTestCase {
 				indexState(CONTENT));
 	}
 
+	@Test
+	public void testAddExistingSingleMediumSizeFileWithNewLine()
+			throws IOException, NoFilepatternException {
+		File file = new File(db.getWorkTree(), "a.txt");
+		FileUtils.createNewFile(file);
+		StringBuilder data = new StringBuilder();
+		for (int i = 0; i < 1000; ++i) {
+			data.append("row1\r\nrow2");
+		}
+		String crData = data.toString();
+		PrintWriter writer = new PrintWriter(file);
+		writer.print(crData);
+		writer.close();
+		String lfData = data.toString().replaceAll("\r", "");
+		Git git = new Git(db);
+		db.getConfig().setString("core", null, "autocrlf", "false");
+		git.add().addFilepattern("a.txt").call();
+		assertEquals("[a.txt, mode:100644, content:" + data + "]",
+				indexState(CONTENT));
+		db.getConfig().setString("core", null, "autocrlf", "true");
+		git.add().addFilepattern("a.txt").call();
+		assertEquals("[a.txt, mode:100644, content:" + lfData + "]",
+				indexState(CONTENT));
+		db.getConfig().setString("core", null, "autocrlf", "input");
+		git.add().addFilepattern("a.txt").call();
+		assertEquals("[a.txt, mode:100644, content:" + lfData + "]",
+				indexState(CONTENT));
+	}
+
 	@Test
 	public void testAddExistingSingleBinaryFile() throws IOException,
 			NoFilepatternException {
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectInserter.java b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectInserter.java
index 0355e56f5..e03fe3571 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectInserter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/lib/ObjectInserter.java
@@ -109,6 +109,29 @@ public abstract class ObjectInserter {
 		return tempBuffer;
 	}
 
+	static private final int tempBufSize;
+	static {
+		String s = System.getProperty("jgit.tempbufmaxsize");
+		if (s != null)
+			tempBufSize = Integer.parseInt(s);
+		else
+			tempBufSize = 1000000;
+	}
+
+	/**
+	 * @param hintSize
+	 * @return a temporary byte array for use by the caller
+	 */
+	protected byte[] buffer(long hintSize) {
+		if (hintSize >= tempBufSize)
+			tempBuffer = new byte[0];
+		else if (tempBuffer == null)
+			tempBuffer = new byte[(int) hintSize];
+		else if (tempBuffer.length < hintSize)
+			tempBuffer = new byte[(int) hintSize];
+		return tempBuffer;
+	}
+
 	/** @return digest to help compute an ObjectId */
 	protected MessageDigest digest() {
 		digest.reset();
@@ -172,7 +195,7 @@ public abstract class ObjectInserter {
 		md.update((byte) ' ');
 		md.update(Constants.encodeASCII(length));
 		md.update((byte) 0);
-		byte[] buf = buffer();
+		byte[] buf = buffer(length);
 		while (length > 0) {
 			int n = in.read(buf, 0, (int) Math.min(length, buf.length));
 			if (n < 0)
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsInserter.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsInserter.java
index 335e284e2..e80a32475 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsInserter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/dfs/DfsInserter.java
@@ -116,7 +116,7 @@ public class DfsInserter extends ObjectInserter {
 	@Override
 	public ObjectId insert(int type, long len, InputStream in)
 			throws IOException {
-		byte[] buf = buffer();
+		byte[] buf = buffer(len);
 		if (len <= buf.length) {
 			IO.readFully(in, buf, 0, (int) len);
 			return insert(type, buf, 0, (int) len);
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectoryInserter.java b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectoryInserter.java
index ffd5c4149..75f6b0bda 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectoryInserter.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/storage/file/ObjectDirectoryInserter.java
@@ -95,8 +95,8 @@ class ObjectDirectoryInserter extends ObjectInserter {
 	@Override
 	public ObjectId insert(final int type, long len, final InputStream is)
 			throws IOException {
-		if (len <= buffer().length) {
-			byte[] buf = buffer();
+		byte[] buf = buffer(len);
+		if (len <= buf.length) {
 			int actLen = IO.readFully(is, buf, 0);
 			return insert(type, buf, 0, actLen);