Merge changes I58110f17,I440baa64,Ic77dcac5

* changes:
  PackWriter: Skip progress messages on fast operations
  IndexPack: Defer the "Resolving deltas" progress meter
  IndexPack: Fix "Resolving deltas" progress meter

org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackWriter.java

@@ -80,6 +80,7 @@ import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.errors.StoredObjectRepresentationNotAvailableException;
 import org.eclipse.jgit.lib.AnyObjectId;
 import org.eclipse.jgit.lib.AsyncObjectSizeQueue;
+import org.eclipse.jgit.lib.BatchingProgressMonitor;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.NullProgressMonitor;
 import org.eclipse.jgit.lib.ObjectId;
@@ -640,10 +641,21 @@ public class PackWriter {
 		if (writeMonitor == null)
 			writeMonitor = NullProgressMonitor.INSTANCE;
 
-		if (reuseSupport != null && (
+		boolean needSearchForReuse = reuseSupport != null && (
 				   reuseDeltas
 				|| config.isReuseObjects()
-				|| !cachedPacks.isEmpty()))
+				|| !cachedPacks.isEmpty());
+
+		if (compressMonitor instanceof BatchingProgressMonitor) {
+			long delay = 1000;
+			if (needSearchForReuse && config.isDeltaCompress())
+				delay = 500;
+			((BatchingProgressMonitor) compressMonitor).setDelayStart(
+					delay,
+					TimeUnit.MILLISECONDS);
+		}
+
+		if (needSearchForReuse)
 			searchForReuse(compressMonitor);
 		if (config.isDeltaCompress())
 			searchForDeltas(compressMonitor);

org.eclipse.jgit/src/org/eclipse/jgit/transport/PackParser.java

@@ -54,6 +54,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
+import java.util.concurrent.TimeUnit;
 import java.util.zip.DataFormatException;
 import java.util.zip.Inflater;
 
@@ -61,6 +62,7 @@ import org.eclipse.jgit.JGitText;
 import org.eclipse.jgit.errors.CorruptObjectException;
 import org.eclipse.jgit.errors.MissingObjectException;
 import org.eclipse.jgit.lib.AnyObjectId;
+import org.eclipse.jgit.lib.BatchingProgressMonitor;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.InflaterCache;
 import org.eclipse.jgit.lib.MutableObjectId;
@@ -478,6 +480,12 @@ public abstract class PackParser {
 			if (!deferredCheckBlobs.isEmpty())
 				doDeferredCheckBlobs();
 			if (deltaCount > 0) {
+				if (resolving instanceof BatchingProgressMonitor) {
+					((BatchingProgressMonitor) resolving).setDelayStart(
+							1000,
+							TimeUnit.MILLISECONDS);
+				}
+				resolving.beginTask(JGitText.get().resolvingDeltas, deltaCount);
 				resolveDeltas(resolving);
 				if (entryCount < objectCount) {
 					if (!isAllowThin()) {
@@ -494,6 +502,7 @@ public abstract class PackParser {
 								(objectCount - entryCount)));
 					}
 				}
+				resolving.endTask();
 			}
 
 			packDigest = null;
@@ -518,20 +527,17 @@ public abstract class PackParser {
 
 	private void resolveDeltas(final ProgressMonitor progress)
 			throws IOException {
-		progress.beginTask(JGitText.get().resolvingDeltas, deltaCount);
 		final int last = entryCount;
 		for (int i = 0; i < last; i++) {
-			final int before = entryCount;
-			resolveDeltas(entries[i]);
-			progress.update(entryCount - before);
+			resolveDeltas(entries[i], progress);
 			if (progress.isCancelled())
 				throw new IOException(
 						JGitText.get().downloadCancelledDuringIndexing);
 		}
-		progress.endTask();
 	}
 
-	private void resolveDeltas(final PackedObjectInfo oe) throws IOException {
+	private void resolveDeltas(final PackedObjectInfo oe,
+			ProgressMonitor progress) throws IOException {
 		UnresolvedDelta children = firstChildOf(oe);
 		if (children == null)
 			return;
@@ -559,12 +565,14 @@ public abstract class PackParser {
 							.getOffset()));
 		}
 
-		resolveDeltas(visit.next(), info.type, info);
+		resolveDeltas(visit.next(), info.type, info, progress);
 	}
 
 	private void resolveDeltas(DeltaVisit visit, final int type,
-			ObjectTypeAndSize info) throws IOException {
+			ObjectTypeAndSize info, ProgressMonitor progress)
+			throws IOException {
 		do {
+			progress.update(1);
 			info = openDatabase(visit.delta, info);
 			switch (info.type) {
 			case Constants.OBJ_OFS_DELTA:
@@ -749,7 +757,8 @@ public abstract class PackParser {
 				entries[entryCount++] = oe;
 
 			visit.nextChild = firstChildOf(oe);
-			resolveDeltas(visit.next(), typeCode, new ObjectTypeAndSize());
+			resolveDeltas(visit.next(), typeCode,
+					new ObjectTypeAndSize(), progress);
 
 			if (progress.isCancelled())
 				throw new IOException(