[JGIT PATCH] Fix performance problem recently introduced to DeltaPackedObjectLoader

[JGIT PATCH] Fix performance problem recently introduced to DeltaPackedObjectLoader

[Shawn O. Pearce]

In fe6c8248e1ed6bd9db76a8314103081a02d55393 ("Fully materialize an
ObjectLoader before returning it from ObjectDatabase") I missed a
crucial return call here in DeltaPackedObjectLoadeder.  That one
missing line caused cache hits in the UnpackedObjectCache to then
fall through and unpack the delta base, and apply the delta onto
it, ignoring the fact that we had a successful cache hit.

When packing and serving e.g. the Linux kernel repository this
resulted in a 10x increase in the number of WindowCache.get()
invocations we saw, as the UnpackedObjectCache was useless.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
---
 .../spearce/jgit/lib/DeltaPackedObjectLoader.java  |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/org.spearce.jgit/src/org/spearce/jgit/lib/DeltaPackedObjectLoader.java b/org.spearce.jgit/src/org/spearce/jgit/lib/DeltaPackedObjectLoader.java
index 8194d94..7d3f30d 100644
--- a/org.spearce.jgit/src/org/spearce/jgit/lib/DeltaPackedObjectLoader.java
+++ b/org.spearce.jgit/src/org/spearce/jgit/lib/DeltaPackedObjectLoader.java
@@ -69,6 +69,7 @@ public void materialize(final WindowCursor curs) throws IOException {
 				objectType = cache.type;
 				objectSize = cache.data.length;
 				cachedBytes = cache.data;
+				return;
 			}
 		}
 
-- 
1.6.3.rc1.205.g37f8